Bio-data

Name: Prof. Ravi KumarFather's Name: Shri Sat PalDate of Birth: December 12, 1965Nationality: IndianPassport Number: Z1177332Present address: Professor and Head,

Centre for Materials Science and Engineering,National Institute of Technology,Hamirpur 177005 (H.P.)Phone: 01972-254080Mobile: 91-9814941401e-mail: ranade65@gmail.com

Educational Qualifications and Position held:Degree University/Institute YearM.Sc. (Hons) Physics Guru Nanak Dev University,

Amritsar1988

Ph.D. Physics* Tata Institute of Fundamental Research, Mumbai

1994

Research Associate Institute of Plasma Research, Ahmedabad

Oct.,1994 to Feb., 1995

Post Doctoral Fellow** Scuola Noramale Superiore, Pisa, Italy

Feb.,1995- Aug, 1996

Scientist D Inter Univesrity Accelerator Centre, New Delhi

Aug., 1996-Oct.2001

Scientist E Inter University Accelerator Centre, New Delhi

Oct.2001-Oct. 2006

Visiting*** Professor School of Physics, Trinity College Dublin, Ireland

July 2004 - till date

Scientist F Inter University Accelerator Centre, New Delhi

Oct.2006- Sept., 2009

Professor&Head Centre for Materials Science & Engg. NIT, Hamirpur

Sept., 2009- May, 2013 (on Extra Ordinary Leave)

Principal Beant College of Engg. & Technolog, Gurdaspur

May, 2013-May, 2016

Professor&Head Centre for Materials Science & Engg. NIT, Hamirpur

May, 2016- till date

*Ph.D. Thesis Title: Magnetization Studies of superconductors (Experimental studies and theoretical Modeling)**Research during PDF: Superconductor/semiconductor hetero-junction: Quasi-particle transport studies at low temperature and high magnetic field.***I am taking course on Materials Science and doing collaborative research with Trinity College Dublin since July 2004. We have published many research papers in collaborations (see the list of publications).

Teaching Experience:

I taught following courses to Pre-Ph.D. Students at IUAC, New Delhi:(1) Ion beams in Superconductors from 1998-2000 (three years)(2) Crystal Structures and lattice defects from 1999-2001 (three years)(3) Applications of Accelerators from 1999-2001 (three years)

I taught following courses at NIT Hamirpur to B.Tech/M.Tech/Ph.D. students from 2009 to 2017:

(1) Advanced Functional oxide materials(2) Characterization of materials(3) Vacuum Science and Cryogenics(4) Thin film science and technology(5) Introduction to Materials Science

Research Supervision: 22 Students have completed Ph.D.

The list Ph.D. Students:

(1) Dr. Ram Janay Choudhary (completed Ph.D. in 2005 and working as Scientist F at UGC-DAE CSR, Indore)(2) Dr. Anjana Dogra (Completed Ph.D. in 2005 and working as Scientist E at NPL, New Delhi)(3) Dr. Basavaraj Angadi (Completed Ph.D. in 2004 and working as Assistant professor at Bangalore University)(4) Dr. M. Wasi Khan (Completed Ph.D. 2007 and working as Assistant Professor at AMU, Aligarh.)(5) Dr. Surender Kumar Sharma (completed Ph.D in 2007 and working as PDF in University of Campinas, Brazil)(6) Dr. Shailendra Kumar Gautam (Completed Ph.D. in 2008 and presently working Associate Professor at Amity University, Gurgaon).(7) Dr. Vinay Kumar Dhiman (Completed Ph.D. in 2007 and working as Assistant Professor at Mata Vaishno Devi University, Katra J&K)(8) Dr. Dinesh Shukla (completed Ph.D. in May, 2009 and presently working as Scientist D at UGC-DAE CSR, Indore).(9) Dr. N.E. Rajeevan (Completed Ph.D. in 2009 and working as Associate professor in Calicut University). (10) Dr. Abhida (completed Ph.D. in 2010 and presently working as lecturer in J&K Government).(11) Dr. Feroz (Completed Ph.D. in 2010 and presently working as RA in NIT Srinagar)(12) Dr. A.P. Singh (Completed Ph.D. in 2010 and presently working as Assistant Professor at NIT Jalandhar)(13) Dr. Ankush Vij (completed Ph.D. in 2010 and presently working as Associate Profesor at Amity University Gurgaon).(14) Dr.Surender Singh. (Completed Ph.D. in 2011)(16) Dr. Yogesh Kumar (Completed Ph.D. 2012 presently working as ISPIRE Fellow at BARC, Mumbai).(17) Dr. Ghazala Anzum (Completed Ph.D. 2012, presently working as Asst. Prof. at Central University Srinagar).(18) Mr. Hardeep Thakur (completed in 2012)(19) Mr. Vinod Kumar (Completed Ph.D. in 2014 and working as Assistant Professor at Beant College of Engg. & Tech. Gurdaspur)(20) Ms. Pawanpreet Kour (Completed Ph.D. in 2015 and working as Assistant Professor at Beant College of Engg. & Tech. Gurdaspur)(21) Ms. Rabia Pandit (Completed Ph.D. Nov. 2015)(22) Ms. Minakshi (Completed Ph.D. in Jan., 2016 and working as PDF at IISER, Mohali)

Research Interest:

(1) High Temperature Superconductors and the study of flux dynamics.(2) Colossal Magneto resistance materials.(3) Spintronics.(4) Nono Ferrites

(5) Multi-ferroic Materials.(6) Polymer nano Composite.

Research Publications:

(1) In International Peer-reviewed Journals: 240 (List attached)(2) In international/national conferences and symposia: about 150(3) In Edited Books: 9

Research Projects:

Development of Materials science facility at IUAC, New Delhi through Department of Science & Technology (DST), Government of India funded projects approximately about Rs. 4 crores

Expert Invited Talks: I have been regularly invited in International and National conferences to give invited talks in my area of specialization by different institution across the county and abroad. Till date I have delivered around 100 invited talks.

Additional responsibilities:

(1) Project review committee member of Department of Science & Technology (DST), Government of India.

(2) Expert of selection committees for various universities and institutes(3) Examiner of Ph.D. Thesis(4) Reviewer of International Journals like Jounal of Applied Physics, Applied

Physics letters, Solid state Communications, Journal of magnetism and magnetic materials etc.

(5) Organized many international and National conferences/summer schools/SERC school/workshops

(6) Advisory committees member of many National and International Conference of my subject area.

International assignments;

(1) Visiting Professor at School of Physics, Trinity College Dublin, Ireland: From 2004- till date

(2) Visiting scientist at Korean Institute of Science & Technology (KIST), Seoul, Korea: From 2005- till date

Membership of Professional Societies:

(1) Life member of Electron Microscopy Society of India (2) Life member of INFM, Italy.

International collaborations:

(1) University of Maryland , Maryland, USA(2) University of Campinas, Campinas, Brazil(3) Trinity College Dublin, Ireland(4) KIST, Seoul, South Korea(5) Pohang Accelerator Laboratory (PAL), Pohang, South Korea(6) European Synchrotron Research Facility (ESRF) Grenoble, France.(7) Changwan University, Changwan, South Korea

Administrative Responsibilities:

(1)Group In-charge, Materials Science Group, Inter University Accelerator Centre, New Delhi (January 1997-September, 2009): To start the Materials science group, I took the responsibility as group in-charge. The group has been established with world class facility to cover the need of Indian universities. About 65 groups of various universities, institutes and colleges got benefit of the facilities generated. I was co-ordinating with the universities to plan their experimental proposals, experiments and scheduling their experiments.

(2)Head, Centre for materials science and Engineering, NIT Hamirpur (September, 2009-May 2013): I have established the centre for materials science and engineering. This centre is planned to have all sophisticated facilities to perform internationally competent resraech and technology. The idea is to have this centre in the state of Himachal Pradesh where no such type of research centre for materials technology is existing. The M.Tech and Ph.D. program in materials science have been started. The centre is working very nicely.

(3)Coordinator Inter-NIT Networking and International programs at NIT Hamirpur (January 2010-May, 2013). In this program I have established collaborations with various foreign laboratories and sent many students for their project work to Finland, Germany and Japan.

(4)Principal, Beant College of Engineering & Technology, Gurdaspur (May, 2013- May, 2016) : The college got Academic Autonomy from University Grant Commission, New Delhi. We have applied for NBA for all the courses and team is scheduled to visit in the month of September 2013. College got “Best Faculty Award” from CMAI National Punjab Education Award 2013.

(5) Member Board of Governors, Shaheed Bhagat Singh State Technical Campus, Ferozepur (May 2013 – May, 2016).

(6) Member Board of Governors, Punjab Technical University, Jalandhar (Feb., 2015- May, 2016).

(7) President’s visitor nominee for Central Universities Selection committees (January, 2015- till date).

(8) Dean Physical and Mathematical Sciebce, I K Gujral PTU, Jalandhar (Since 2015 onward).

(9) Executive Council member, Central University Himachal Pradesh (June 2017 till date).

(10) Head, Centre for Materials Science and Engineering (October, 2016 till date), National Institute of Technology, Hamirpur 177005 (H.P.)

Annexure-I List of Publications

20171. “Structural, dielectric and magnetic studies of multiferroic Bi1-xSrxFeO3

(x= 0.1, 0.2, 0.3, 0.4 and 0.5).” Jaiprakash, R.S. Chauhan, Ravi Kumar, Pawan

Kumar and Anil Kumar, Solid State Sciences 72 (2017) 5.

20162. “Thin film growthofmultiferroicLa0.8Bi0.2Fe0.7Mn0.3O3 on LaNiO3

using RF sputtering and its characterization”. G. Anjum. F.H. Bhat

and Ravi Kumar, Materials Letter 185 (2016) 112.

3. “Disappearance of metal-insulator transition in NdNiO3/LaAlO3 thin

films”. Yogesh Kumar, R.J. Choudhary and Ravi Kumar, Journal of

Appl. Phys. 120 (2016) 115306.

4. “Ni 3d – O 2p hybridization dependent magnetic properties of

LaNiO3 thin films”. Yogesh Kumar, Abhinav Pratap Singh, S.K.

Sharma, R.J. Choudhary, P. Thakur, M. Knobel, N.B. Brookes and Ravi

Kumar, Thin Solid Films 619 (2016) 144.

5. “Ferri-magnetic order in Mn induced spinel Co3_xMnxO4 (0.1 ≤ x ≤ 1.0) ceramic compositions”. P.L. Meena, K. Sreenivas, M.R. Singh,

Ashok Kumar, S.P. Singh and Ravi Kumar, J. Magnetism and Magnetic

Materials 403 (2016) 193.

6. “Radiation induced colour centers in Cr doped LiF Phosphors”.

Satinder Kumar, A.K. Gathania, Anjush Vij and Ravi Kumar, materials

Focus 5 (2016) 281.

2015

7. “Neutron diffraction studies of magnetic ordering in Ni-doped LaCoO3.”

N.E Rajeevan, Vinod Kumar, Rajesh Kumar, Ravi Kumar, S.D. Kaushik, J. Mag.

Mag. Mat. 393 (2015) 394.

8. “Super paramagnetic behavior of indium substituted NiCuZn nano ferrites”.

Mohd.Hashim, Sagar E. Shirsath, S. S. Meena, R.K.Kotnala, Shalendra Kumar,

D. Ravinder, M. Raghasudha, Pramod Bhatt, Erdogen Senturk, Alimuddin and

Ravi Kumar, Journal of Magnetism and Magnetic Materials 381 (2015) 416.

9. “Room temperature multiferroic behaviour and magnetoelectric coupling in

Sm/Fe modified Bi4Ti3O12 ceramics synthesized by solid state reaction method”.

Joginder Paul, Sumit Bhardwaj, K.K. Sharma, R.K. Kotnala and Ravi Kumar, J.

Alloys and Compounds 634 (2015) 58.

201410. “Spin states and glassy magnetism in LaCo1-xNixO3 (x= 0-0.5)”. Vinod Kumar,

Rajesh Kumar, D.K. Shukla, S.K. Arora, I.V. Shvets, Kiran Singh and Ravi Ku-

mar, Materials Chemistry and Phys. 147 (2014) 617.

11. “Room temperature multiferroic properties and magnetoelectric coupling in

Bi4-xSmxTi3-xCoxO12-δ ceramics”. Joginder Paul, Sumit Bhardwaj, K.K. Sharma,

R.K. Kotnala and Ravi Kumar, J. Materials Science, 49 (2014) 6056.

12. “Room temperature multiferroic properties and magnetoelectric coupling in

Sm and Ni substituted Bi4-xSmxTi3-xNixO12-δ (x =0, 0.02,0.05, 0.07) ceramics”.

Joginder Paul, Sumit Bhardwaj, K.K. Sharma, R.K. Kotnala and Ravi Kumar, J.

Appl. Phys. 115 (2014) 204909.

13. “Dielectric modulus and magneto-capacitance behavior of Bi3.7S-

m0.3Ti2.7Ni0.3O12-δ multiferroic”. Sumit Bhardwaj, JoginderPaul, K.K. Raina, N.S.

Thakur and Ravi Kumar, Physica B448 (2014) 194.

14. “Evidence of spin glass state in NdCo1-xNixO3 (x= 0.3 -0.5)”. Vinod Kumar,

Rajesh Kumar, Kiran Singh, S.K. Arora, I.V. Shvets and Ravi Kumar, J. Appl.

Phys. 116 (2014) 073903.

15. “Superconductivity suppression in YBa2Cu3O7-δ/La0.7Sr0.3MnO3 thin films”.

Minaxi Sharma, K.K. Sharma, R.J. Choudhary and Ravi Kumar, J. Appl. Phys.

116 (2014) 233905.

16. ‘Study of Structural, dielectric and magnetic properties of Bi1-xBaxFeO3 (x =

0.1- 0.4)”, Jaiprakash, R.S Chauhan, Ravi Kumar, Yogesh Kumar, N E Rajee-

van, N Vijayan, Journal of Alloys and Compounds 598, 248–252 (2014).

17. Spin canting observation and cation distribution in CoFe2-xInxO4 (x = 0.0-1.0)

ferrites through low temperature-high field Mossbauer spectral study, Rabia

pandit, K K Sharma, Pawanpreet Kaur, V R Reddy, Ravi kumar, Jyoti Shah,

Journal of Alloys and Compounds 596, 39–47 (2014).

18. Effect of Al+3 substitution on structural , cation distribution, electrical and

magnetic properties of CoFe2O4, Rabia pandit, K K Sharma, Pawanpreet Kaur,

R K Kotnala, Jyoti Shah, Ravi kumar, Journal of Physics and Chemistry of

Solids 75, 558-569 (2014)

19. Effect of superconducting spacer layer thickness on magneto-transport and

magnetic properties of LaSr0.7Mn0.3O3/YBa2Cu3O7/La0.7Ba0.3MnO3 het-

erostructures, Minaxi Sharma, Pankaj K Pandey, K K Sharma, Ravi Kumar, R J

Chaudhary, D Venketshwarlu, and V Ganesan, J. Appl. Phys. 115, 013901 (2014)

20. Electrical and magneto-transport properties of ferromagnet/

superconductor/ferromagnet based heterostructure, Minaxi Sharma, K K

Sharma, Ravi Kumar, R J Chaudhary, Physica C 497, 30-33 (2014).

21. Structral, electrical and magnetic properties of SrRuO3 thin films, Pawan-

preet Kaur, K K Sharma, Rabia pandit, R J Chaudhary, Ravi Kumar, Applied

Physics Letters 104, 081608 (2014).

201322. “Structural, magnetic and x-ray absorption studies of NdCo1-xNixO3 (0 x

0.5)”. Vinod Kumar, Yogesh Kumar, Rajesh Kumar, D.K. Shukla, I.V. Shvets

and Ravi Kumar, J. Appl. Phys. 113 (2013) 043918.

23. “X-ray absorption spectroscopy and photoluminescence study of rare earth

ions doped strontium sulphide phosphors”. Ankush Vij, Sanjeev Gautam,

Vinay Kumar, R. Brajpuriya, Ravi Kumar, Nafa Singh, and K.H. Chae, Appl.

Surf. Science 264 (2013) 237.

24. Disorder Controlled Electrical Transport Properties of NdCo1-xNixO3 (0 ≤ x ≤

0.5), Vinod Kumar, Rajesh Kumar, D. K. Shukla, Ravi Kumar, Journal of Alloys

and Compounds 574, 316–319 (2013).

25. Electronic Structure and Electrical Transport Studies of LaCo1-xNixO3 (0 ≤ x

≤ 0.5), Vinod Kumar, Rajesh Kumar, D.K. Shukla, S. Gautam, Keun Hwa Chae

and Ravi Kumar, Journal of Applied Physics, 114, 073704 (2013).

26. “Investigation of structural, dielectric, magnetic and antibacterial activity of

Cu-Cd-Ni-FeO4 nanoparicles”. Mohd. Hashim, Alimuddin, Sagar E. Shirasth,

S.S. meena, Shalendra kumar, Pramod Bhatt, Ashis S. Rpy, Parveen C. Rama-

murthy and Ravi Kumar, J. Mag. & Mag. Materials 341 (2013) 148.

27. “Study of structural and magnetic properties of (Co-Cu)Fe2O4/PANI com-

posites”. Mohd. Hashim, Alimuddin, Sagar E. Shirasth, S.S. meena, Shalendra

kumar, Pramod Bhatt, R.B. Jotania and Ravi Kumar, Materials Chem. & Phys.

(2013) 1-10.

28. “Influence of Ni substitution on structural, dielectric and magnetic proper-

ties of Cu-Cd ferrite anoparticles”. Mohd. Hashim, Alimuddin, Sagar E. Shi-

rasth, R.K. KotnalaS.S. meena, Shalendra Kumar, Ashis S. Roy, R.B. Jotania

Pramod Bhatt and Ravi Kumar, J. Alloys and Compounds 513 (2013) 198.

29. “Structural, dielectric, AC conductivity and magnetic properties of Cr3+

substituted Ni-Mg ferrite nanoparticles”. Mohd. Hashim, Alimuddin, Sagar E.

Shirasth, E.M. Mohammed and Ravi Kumar. J. Nanoengineerin and

Nanomanufacturing 3 (2013) 39.

201230. “Swift heavy ion irradiation effect on structural and optical properties of

CeO2 thin films”. Mayora Varshney, Aditya Sharma, K.D. Verma and Ravi Ku-

mar, Nanoscience and Nanotechnology Lett. 4 (2012) 66-71.

31. “Strain controlled systematic variation of metal insulator transition in epi-

taxial NdNiO3 thin films”. Yogesh Kumar, R.J. Choudhary and Ravi Kumar, J.

Appl. Phys. 112 (2012) 073718.

32. “Strain dependent stabilization of metallic paramagnetic state in NdNiO3

thin films”. Yogesh Kumar, R.J. Choudhary, S.K. Sharma, M. Knobel and Ravi

Kumar, Appl. Phys. Lett. 101 (2012) 132101.

33. “Structural, electronic structure and magnetic studies of GdFe1-xNixO3 (x

0.5)”. Abida Bashir, M. Ikram, Ravi Kumar and P.N. Lisoba-Filho, J. Alloys and

Compounds 512 (2012) 183-188.

34. “Irradiation induced modifications in transport properties of LaNiO3 thin

films: An x-ray absorption study”. Yogesh Kumar, A.P. Singh, S.K. Sharma,

R.J. Choudhary, P. Thakur, M. Knobel, N.B. Brooke and Ravi Kumar, Appl.

Phys. Lett. 101 (2012) 112103

35. “Thermo-luminescence studies of tissue equivalent lithium fluoride

nanophosphors”. A.K. Sharma, R. Dogra, S.K. Mishra, S.P. Lochab and Ravi

Kumar, Science of Advance Materials 4 (2012) 147-150.

36. “Structural and magnetic properties of Ce1-xCoxO2 (0 x 0.1) nanocrys-

talline powders”. Mayora Varshney, Aditya Sharma, K.D. Verma and Ravi Ku-

mar, Physica Scripta 86 (2012) 015605.

37. “Amorphization and disorder of PrFeO3 thin films after heavy ion irradia-

tion”. Feroze Ahmed Mir, M. Ikram, and Ravi Kumar, Applied Radiation and

Isotopes 70 (2012) 2409.

38. “Combining magnetism and ferroelectricity towards multiferrocity”(A re-

view). Dinesh Shukla, Nhalil Rajeevan and Ravi Kumar, Solid State Phenome-

non 189 (2012) 15-40.

39. “Blue shift in band gap and photoluminescence of pulsed laser deposited

SrS:Ce/quartz thin film nanophosphors”. Ankush vij, Sanjeev Gautam, Ravi

Kumar, Amit K. Chawla, Ramesh Chandra, Nafa Singh and K.H. Chae, J. Alloys

and Compounds 527 (2012) 1-4.

40. “Structural, Magnetic and Electrical properties Al3+ substituted Ni-Zn fer-

rite naoparticles”. Mohd. Hashim, Alimuddin, Salendra Kumar, Sikader Ali,

B.H. Koo, H Chung and Ravi Kumar. J. Alloys & Compounds 511 (2012) 107.

41. “Structural, Electrical and Magnetic properties of Co-Cu ferrite nanoparti-

cles”. Mohd. Hashim alimuddin, Shalendra Kumar, B.H. Koo, Sagar E. Shirsath,

E.M. Mohammed, Joyti Shah, R.K. Kotnala, H. Chung and Ravi Kumar, J. Alloys

& Compounds 518 (2012) 11.

42. “Structural properties an magnetic interactions in Ni0.5Mg0.5Fe2-x CrxO4

(0≤x≤1)”. Mohd. Hashim, Alimuddin, Shalendra Kumar, B.H. Koo, Sagar E.

Shrisath, R.K. Kotnala and Ravi Kumar. Powder Technology 229 (2012) 37.

43. “Studies on the activation energy from the ac conductivity measurements of

rubber ferrite composites containing Mg-Zn ferrite”. Mohd. Hashim, Alimud-

din, Shalendra Kumar, Sagar E. Shrisath, E.M. Mohammed and Ravi Kumar.

Physica B407 (2012) 4097.

201144. “Orbital anisotropy in SnO2 thin films and its modification by swift heavy

ion irradiation”. H. Thakur, Ravi Kumar, P. Thakur, N.B. Brookes, K.K.

Sharma, A.P. Singh, Yogesh Kumar, S. Gautam and K.H. Chae, Chem. Phys.

Lett. 511 (2011) 322-325.

45. “Studies of transport properties of ReFe1-xNixO3 (x 0.5) where Re = Nd Sm

and Gd”. Abhida Bhasir, Mohmad Ikram and Ravi Kumar, Modern Phys. Lett.

25 (2011) 1787.

46. “NEXAFS studies La0.8Bi0.2Fe1-xMnxO3 (0.0< x < 0.4) multiferroic system us-

ing x-ray absorption spectroscopy”. G. Anzum, Ravi Kumar, S. Mollah,

P.Thakur, S. Gautam and K.H. Chae, J. Phys. D Appl. Phys. 44 (2011) 075403.

47. “Growth of nano-pillars in SnO2 thin films using ion irradiation and its gas

sensing properties”. Aditya Sharma, K.D. Verma, M. Varshney, A.P. Singh, Yo-

gesh Kumar, S. Shrivatava, Y. K. Vijay, K. Asokan, R.J. Choudary and Ravi Ku-

mar, Adv. Sci. Lett. 4 (2011) 1-7.

48. “Evolution of magnetic nanophases of Ni embedded in Al2O3 (001) matrix by

X-ray magnetic circular dichroism.” P. Thakur, Ravi Kumar, J.C. Cezar. N.B.

Brookes, Aditya Sharma, S.K. Arora, S. Gautam, Arvind Kumar, K.H. Chae and

I.V. Shvets. Chemical Physics Letters 501 (2011) 404.

49. “Irradiation induced ferromagnetism at room temperature in TiO2 thin

films:X-ray magnetic circular dichroism characterizations”. Hardeep Thakur,

P. Thakur, Ravi Kumar, N.B. Brookes, K.K. Sharma, A.P. Singh, Yogesh Ku-

mar, S. Gautam and K.H. Chae, Appl. Phys. Lett. 98 (2011) 192512.

50. “Magnetoelectric behavior of ferrimagnetic BixCo2-xMnO4 (x = 0, 0.1 and 0.3) thin films” N.E. Rajeeva, Ravi Kumar, D.K. Shukla, R.J. Chaudhary, P. Thakur, A.K. Singh, S. Patnaik, S.K. Arora, I.V. Shvets, P.P. Pradyumnan, J. Mag. Mag. Mat. 323 (2011) 1760.

51. “Effect of Zirconium doping on ferroelectric properties and leakage current mechanism on Bi3.25La0.75Ti3O12 (BLT) thin films.” Prikshit Gautam, Sudipta Bhattacharyya, Sushil K. Singh, Ravi Kumar and Ram Pal Tandon, Phys. Status Solidi B 248 (2011) 1010.

52. Paramagnetic and anti-ferromagnetic interactions in sol–gel derived Zn1−xMnxO [ 50 MeV Li3+ irradiated (x= 0.04) and unirradiated (x=0.02 and 0.04)] samples”. S.K. Neogi, R. Karmakar, A. Banerjee, S. Bandopadhyay, Ravi Ku-mar, Alok Banerjee, A. Mallik and T.P. Sinha, Rad. Eff. & Deff. In Solids 166 (2011) 675.

53. “Temperature-dependent Raman studies of PrFeO3 Thin films”. Feroz Ahmed Mir, M. Ikram and Ravi Kumar, J. of Raman Spectroscopy 42 (2011) 201-208.

54. “Swift heavy ion irradiation induced nanoparticle formation in CeO2 thin films”. Mayora Varshney, Aditya Sharma, Ravi Kumar and K.D. Verma, Nucl. Inst. Meth. Phys. Res. B269 (2011) 2786.

201055. “Structural, electronic, and magnetic properties of Co doped SnO2 nanopar-

ticles”. Aditya Sharma, Abhinav Pratap Singh, P. Thakur, N. B. Brookes, Shal-

endra Kumar, Chan Gyu Lee, R. J. Choudhary, K. D. Verma, and Ravi Kumar. J.

Appl. Phys. 107, 093918 (2010).

56. Structural, dielectric, and magnetic properties of La 0.8Bi0.2Fe1−xMnxO3 (0.0 ≤ x

≤ 0.4) multiferroics. G. Anjum, Ravi Kumar, S. Mollah, D. K. Shukla, Shal-

endra Kumar, and C. G. Lee. J. Appl. Phys. 107, 103916 (2010).

57. Influence of 190 MeV Ag +15 ion irradiation on electrical transport and mag -

netic properties of LaFe1−xNixO3 (x = 0.3 and 0.4) thin films.”M. Wasi Khan,

M. A. Majeed Khan, Mansour Alhoshan, M. S. AlSalhi, A. S. Aldwayyan, Ravi

Kumar, and Shahid Husain. J. Appl. Phys. 107, 093704 (2010).

58. Modifications in magnetic properties of BiMn 2O5 multiferroic using swift

heavy ion irradiation. D. K. Shukla, Ravi Kumar, S. Mollah, R. J. Choudhary,

P. Thakur, S. K. Sharma, N. B. Brookes, and M. Knobel . J. Appl. Phys. 107,

09D903 (2010).

59. “Fe Mössbauer investigation of nanostructured zinc ferrite irradiated by 100

MeV oxygen beam.” R C Srivastava , J P Singh , H M Agrawal , Ravi Kumar ,

A Tripathi , R P Tripathi , V R Reddy and  A Gupta . J. Phys.: Conf. Ser. 217

(2010) 012109.

60. “Magnetic study of nanostructured zinc ferrite irradiated with 100 MeV O-

beam”. Jitendra Pal Singh, R.C. Srivastava, H.M. Agrawal, Ravi Kumar, V.R.

Reddy, Ajay Gupta. Journal of Magnetism and Magnetic Materials 322 (2010)

1701-1705.

61. “Mössbauer studies and magnetic studies of Ni doped orthoferrites

PrFe1−xNixO3 (x≤0.3)”. Abida Bashir Makhdoomi, M Ikram, Ravi Kumar, Jour-

nal of Magnetism and Magnetic Materials 322 (2010) 2581-2584.

62. “Magnetic behaviour of nanosized zinc ferrite under heavy ion irradiation”.

Jitendra Pal Singh, R.C. Srivastava, H.M. Agrawal, Ravi Kumar.

Nuclear Instruments and Methods in Physics Research B 268, (2010)1422-

1426.

63. “Impedance studies on high energy Li3+ irradiated PZT thin films.” Basavaraj

Angadi, V.M. Jali, Ravi Kumar, S.B. Krupanidhi

Nuclear Instruments and Methods in Physics Research Section B 268 (2010)

476-480.

64. “Thermoluminescence response and trap parameters determination of

gamma exposed Ce doped SrS nanostructures”. Ankush Vij, S.P. Lochab, Ravi

Kumar, Nafa Singh. Journal of Alloys and Compounds, 490 (2010) L33-L36.

65. “ Magneto-electric coupling in multiferroic La0.8Bi0.2FeO3 ceramic.” G. An-

jum, S. Mollah, D.K. Shukla and Ravi Kumar, Materials Letter 64 (2010)

2003-2005.

66. “Evidence of quantum correction to conductivity in strained epitaxial

LaNiO3 thin films”. Yogesh Kumar, R.J. Choudhary, A.P. singh, G. Anjum and

Ravi Kumar, J. Appl. Phys. 108 (2010) 083706.

67. “Reversal of orbital magnetic moment on substitution of Bi in Co2MnO4: A

magnetic Compton scattering study” B.L. Ahuja, Alpa Dashora, N.L. Heada,

Ahailja Tiwari, N.E. Rajeevan, M. Itou, Y. Sakurai and Ravi Kumar, Appl.

Phys. Lett. 97 (2010) 212502.

68. “Swift heavy irradiation induced magnetism in frustrated BiMn2O5 thin

films”. D.K. Shukla, Ravi Kumar, S. Mollah, R.J. Choudhary, P. Thakur, S.K.

Sharma, N.B. Brookes and M. Knobel. Phys. Rev. B. 82 (2010) 174432.

69. “Growth of nano pillars in SnO2 thin films by ion irradiation and its gas

sensing properties”. Aditya Sharma, K.D. Verma, Mayora Varshney, A.P. Singh,

Yogesh Kumar, Subhod Srivastava, Y.K. Vijay, K. Asokan, R.J. Choudhary and

Ravi Kumar. Advanced Science Letters 4 (2010) 1.

70. “Inspection of multiferrocity in BiMn2-xTixO5 ceramics through specific heat

and Raman spectroscopic studies”. D.K. Shukla, Ravi Kumar, S. Mollah, R.J.

Choudhary, P.N. Vishwakarma, V.G. Sathe, and V. Ganesan. J. Phys. Con-

densed Matter 22 (2010) 485901.

71. “Effect of 100 MeV O ion beam irradiation on structural , optical and elec-

tronic properties of SnO2 thin films”. Aditya Sharma, K.D. Verma, Mayora

Varshney, Devendra Singh, Moti Singh, K. Asokan and Ravi Kumar. Radiation

Effects & Defects in Solids (2010).

72. “Physical Properties Of Eu3Ba2Mn2Cu2O12”. N. Kumar, S. Rayaprol, A. Dogra, S.D. Kaushik, K. Singh, N.K. Gaur, G. Anjum, Y. Kumar, Ravi Kumar, K.K. Iyer and E.V. Sampatkumaran. In-ternational Conference of Physics Emerging Functional materials (PEFM-2010) 355-357.

2009

73. Direct observation of oxygen induced room temperature ferromagnetism in

MoO2 thin films by x-ray magnetic circular dichroism characterizations. P.

Thakur, J. C. Cezar, N. B. Brookes, R. J. Choudhary, Ram Prakash, D. M. Phase,

K. H. Chae, and Ravi Kumar. Appl. Phys. Lett. 94, 062501 (2009).

74. “Structural, electrical and magnetic properties of Bi-substituted Co2MnO4”.

N.E. Rajeevan, Ravi Kumar, D.K. Shukla, P.P. Pradyumnan, S.K. Arora, I.V.

Shvets. Materials Science and Engineering: B, 163 (2009)8-56.

75. “Effect of crystallographic orientation of nanocrystalline TiN on structural,

electrical and mechanical properties of TiN/NiTi thin films.” Ashvani Kumar,

Devendra Singh, Ravi Kumar, Davinder Kaur, Journal of Alloys and Com-

pounds, 479, (2009) 166-172.

76. “Thermoluminescence study of UV irradiated Ce doped SrS nanostructures”.

Ankush Vij, S.P. Lochab, Surender Singh, Ravi kumar, Nafa Singh, Journal of

Alloys and Compounds, 486 (2009) 554-558.

77. Dielectric studies of Co3−xMnxO4 (x = 0.1–1.0) cubic spinel multiferroic. P. L.

Meena, Ravi Kumar, C. L. Prajapat, K Sreenivas, and Vinay Gupta. J. Appl.

Phys. 106, 024105 (2009).

78. Structural and transport properties of Bi-substituted Co 2MnO4. Ravi Ku-mar, S. K. Arora, I. V. Shvets, N. E. Rajeevan, P. P. Pradyumnan, and D. K. Shukla. J. Appl. Phys. 105, 07D910 (2009).

79. Bi-substitution-induced magnetic moment distribution in spinel

BixCo2−xMnO4 multiferroic. N E Rajeevan , Ravi Kumar , D K Shukla , P

Thakur , N B Brookes , K H Chae , W K Choi , S Gautam , S K Arora , I V

Shvets and  P P Pradyumnan. 2009 J. Phys.: Condens. Matter 21 406006.

80. Electronic structure studies of Fe-doped ZnO nanorods by x-ray absorption

fine structure. Sanjeev Gautam , Shalendra Kumar , P Thakur , K H Chae , Ravi

Kumar , B H Koo and  C G Lee. 2009 J. Phys. D: Appl. Phys. 42 175406.

81. Solubility of Co clusters in Co-implanted ZnO thin films by 200 MeV Ag15+

ions irradiation. M Wasi Khan , Ravi Kumar , M A Majeed Khan , Basavaraj

Angadi , Y S Jung , W K Choi and  J P Srivastava. 2009 Semicond. Sci. Technol.

24 095011.

82. Structural, magnetic and electronic structure studies of NdFe1−xNixO3 (0 ≤ x ≤

0.3). Abida Bashir , M Ikram , Ravi Kumar , P Thakur , K H Chae , W K Choi

and  V R Reddy. 2009 J. Phys.: Condens. Matter 21 325501.

83. Engineering structural & magnetic properties of MgMnFe2O4 thin film using

200MeV Au Ions. Shalendra Kumar, S.K. Sharma, R.J. Choudhary, C G Lee, B

H Koo, Alimuddin, and Ravi Kumar. J. Ceram. Soc. Japan. 117, 685 (2009).

84. Dielectric and Conductivity Studies of Sr[(Mg0.32Co0.02) Nb0.66]O3 Thin Film.

P.K.Mehta, B Bishnoi, R Kumar, R. J. Choudhary, and D. M. Phase, Sol. St.

Phen. 155, 145 (2009).

85. Structural and magnetic properties of bulk and thin films of Mg0.95Mn0.05Fe2O4.

Shalendra Kumar, S.K. Sharma, Alimuddin, M. Knobel, R.J. Choudhary, Chan

Gyu Lee, B.H. Koo and Ravi Kumar, Current Appl. Phys. 9, 1009 (2009).

86. Thin film growth of multiferroic BiMn2O5 using pulsed laser ablation and its

characterization. D K Shukla , Ravi Kumar , S K Sharma , P Thakur , R J

Choudhary , S Mollah , N B Brookes , M Knobel , K H Chae and  W K Choi .

2009 J. Phys. D: Appl. Phys. 42 125304.

87. Synthesis and luminescence studies of Ce doped SrS nanostructures. Ankush

Vij , Surender Singh , Ravi Kumar , S P Lochab , V V S Kumar and  Nafa Singh.

2009 J. Phys. D: Appl. Phys. 42 105103.

88. NEXAFS and XMCD studies of single-phase Co doped ZnO thin films. Abhi-

nav Pratap Singh , Ravi Kumar , P Thakur , N B Brookes , K H Chae and  W K

Choi. 2009 J. Phys.: Condens. Matter 21 185005.

89. Effect of 200 MeV Ag ion irradiation on structural, and magnetic properties

of Mg0.95Mn0.05Fe2O4 ferrite thin films. S.K. Sharma , Shalendra Kumar , R.J. Choudhary, Ravi Kumar , Surface & Coatings Technology 203 (2009)

2707–2711.

90. Structural, magnetic and electronic structure studies of NdFe1−xNixO3 (0 ≤ x

≤ 0.3). Abida Bashir , M Ikram , Ravi Kumar , P Thakur , K H Chae , W K Choi

and  V R Reddy. 2009 J. Phys.: Condens. Matter 21 325501.

91. “Irradiation induced texturing in the Mg0.95Mn0.05Fe2O4 fer-rite thin film” S.K. Sharma, Shalendra Kumar, P. Thakur, Al-imuddin, R.J. Choudhary, D.M. Phase, C.T. Meneses, M. Knobel, C.G.

Lee, M. Singh, Ravi Kumar, Thin Solid Films, 517 2758-2761(2009).

92. “Room temperature ferromagnetism in chemically synthesized ZnO rods”

Shalendra Kumar, Y.J. Kim, B.H. Koo, S. Gautam, K.H. Chae, Ravi Kumar,

C.G. Lee, Materials Letters, 63 194 (2009).

200893. “Role of electron energy loss in modification of C60 thin films by swift heavy

ions” Navdeep Bajwa, Alka Ingale, D. K. Avasthi, Ravi Kumar, A. Tripathi,

Keya Dharamvir, and V. K. Jindal J. Appl. Phys. 104 054306 (2008).

94. “Ferromagnetism and metal–semiconducting transition in Fe-doped ZnO

thin films” Ravi Kumar, Abhinav Pratap Singh, P Thakur, K H Chae, W K

Choi, Basavaraj Angadi, S D Kaushik and S Patnaik, J. Phys. D Appl. Phys. 41

155002 (2008).

95. “Electrical transport and 1/f noise properties of LaFe1−xNixO3 (x = 0.3, 0.4

and 0.5) thin films” M Wasi Khan, Ravi Kumar, R J Choudhary, J P Srivastava,

S I Patil and W K Choi, J. Phys. D: Appl. Phys. 41 175409 (2008).

96. “Local structure, optical and magnetic studies of Ni nanostructures embed-

ded in a SiO2 matrix by ion implantation” S K Sharma, P Kumar, Ravi Ku-

mar, M Knobel, P Thakur, K H Chae, W K Choi, R Kumar and D Kanjilal, J.

Phys.: Condens. Matter 20 285211 (2008).

97. “Role of interparticle interactions on the magnetic behavior of Mg0.95M-

n0.05Fe2O4 ferrite nanoparticles” S K Sharma, Ravi Kumar, Shalendra Kumar,

M Knobel, C T Meneses, V V Siva Kumar, V R Reddy, M Singh and C G Lee, J.

Phys.: Condens. Matter 20 235214 (2008).

98. “Structural and magnetic properties of bulk and thin films of Mg0.95M-

n0.05Fe2O4” Shalendra Kumar, S.K. Sharma, Alimuddin, M. Knobel, R.J. Choud-

hary, Chan Gyu Lee, B.H. Koo, Ravi Kumar, Current Applied Physics In Press,

Corrected Proof, Available online 13 November 2008.

99. “Magnetic behaviour of nanocrystalline Ni–Cu ferrite and the effect of irra-

diation by 100 MeV Ni ions” S.N. Dolia, Ravi Kumar, S.K. Sharma, M.P.

Sharma, Subhash Chander, M. Singh, Current Applied Physics 8 620 (2008).

100. “Investigation of deep level defects in copper irradiated bipolar junc-

tion transistor” K.V. Madhu, Ravi Kumar, M. Ravindra, R. Damle, Solid-State

Electronics, 52 1237 (2008).

101. “Electronic structure studies of Mg0.95Mn0.05Fe2−2xTi2xO4

(0≤x≤0.8)” Shalendra Kumar, Ravi Kumar, P. Thakur, K.H. Chae, S.K. Sharma,

Alimuddin, Journal of Magnetism and Magnetic Materials 320 e121 (2008).

102. “Adiabatic small polaron-hopping conduction in Ln0.85Ca0.15MnO3

(Ln=Nd, Pr and Sm) perovskites” S. Mollah, Z.A. Khan, D.K. Shukla, M. Ar-

shad, Ravi Kumar, A. Das, Journal of Physics and Chemistry of Solids, 69 1023

(2008).

103. “Effect of 200 MeV Ag15+ ion irradiation on structural and electrical

transport properties of Fe3O4 thin films” Ram Prakash, R.J. Choudhary, Shailja

Tiwari, D.M. Phase, Ravi Kumar, Nuclear Instruments and Methods in Physics

Research Section B: Beam Interactions with Materials and Atoms, 266 1242

(2008).

104. “Modifications of the structural, electrical and magnetic properties of

LaFe0.5Ni0.5O3 thin films by 190 MeV Ag ion irradiation” R.J. Choudhary, Ravi

Kumar, M. Wasi Khan, J.P. Srivastava, S.I. Patil, S.K. Arora, I.V. Shvets, Nu-

clear Instruments and Methods in Physics Research Section B: Beam Interactions

with Materials and Atoms 266 1611 (2008).

105. “Structural, dielectric and ferroelectric study of Ba0.9Sr0.1ZrxTi1−xO3

ceramics prepared by the sol–gel method” Manoj Kumar, Ashish Garg, Ravi

Kumar, M.C. Bhatnagar, Physica B: Condensed Matter, 403 1819 (2008).

106. “Effect of Ti substitution on multiferroic properties of BiMn2O5” D.K.

Shukla, S. Mollah, Ravi Kumar, P. Thakur, K.H. Chae, W.K. Choi and A.

Banerjee, J. Appl. Phys. 104, 033707 (2008).

107. “X-ray absorption and emission spectroscopy of BiMn2-xTixO5

(0<x<0.5).” P. Thakur, K.H.Chae, C.N.Whang, G.S.Chang, D.K.Shukla, S. Mol-

lah, and Ravi Kumar, J. Korean Physical Soc. 53 (2008)14449.

108. “Magnetoelectric properties of BixCo2-xMnO4 (0 ≤x ≤ 0.3)” N.E Rajee-

van, P.P. Pradyumnan, Ravi Kumar, D.K. Shulkla, S. Kumar, A.K. Singh, S.

Patnaik, S.K. Arora, I.V. Shvets, Appl. Phys. Lett. 92, 102910 (2008).

109. “Magnetotransport, noise and X-ray circular dichroism studies of

pulsed laser deposited Fe3O4 thin films on Si substrates”. R.J. Choudhary,

Shailja Tiwari, D.M. Phase, Ravi Kumar, P. Thakur, K.H. Chae and W.K. Choi,

Appl. Phys. Lett. 92, 072104 (2008).

110. “Structural, electrical and magneti studies of Mo1-xFexO2 (x=0-0.05)

thin films grown by pulse laser ablation”. Ram Prakash, D.M. Phase, R.J.

Choudhary and Ravi Kumar, J. Appl. Phys. 103, 043712 (2008).

111. “Strucural and elastic properties Ca substituted LaMnO3 at 300K”.

J.J.U. Buch, G. Lalitha, T.K. Pathak, N.H. Vasoya, V.K. Lakhani, P.V. Reddy,

Ravi Kumar and K.B. Modi, J. Phys. D: Appl. Phys. 41, 025406 (2008).

2007112. “Structural, electrical, magnetic and electronic structure studies of PrFe1-

xNixO3 (x 0.5)”. Ravi Kumar, R.J. Choudhary, M. Ikram, D.K. Shukla, S.

Mollah, P. Thakur, K.H. Chae, Basavaraj Angadi and W.K. Choi, J. Appl. Phys.

102, 073707 (2007).

113. “Electrical transport, magnetic and electronic structure studies of

Mg0.95Mn0.05Fe2-2xTi2xO4 (0 x 0.5)”. Shalendra Kumar, Alimuddin,

Ravi Kumar, P. Thakur, K.H. Chae, Basavaraj Angadi and W.K. Choi, J. Phys.

Condens. Matter 19, 476210 (2007) .

114. “Dielectric characteristics of substituted M-type strontium hexaferrite

crystals and their modifications on swift heavy ion irradiation” Balwinder Kaur,

Monita Bhat, F. Licci, Ravi Kumar, K. K. Bamzai, P. N. kotru, Materials Chem-

istry and Physics, 103, 255-263 (2007).

115. “Influence of TiO2 and ZnO on conductivity and dielectric properties of

copper-bismuth glasses”. D. K. Shukla, S. Mollah and Ravi Kumar, J. Appl.

Phys. 101, 013708 (2007).

116. “Temperature-dependent Mössbauer and dielectric studies of Mg0.95M-

n0.05Fe1.0Ti1.0O4” Shalendra Kumar, Ravi Kumar, S.K. Sharma, V.R. Reddy, A.

Banerjee and Alimuddin, Solid State Communications 141, 706 (2007).

117. “Swift heavy ion induced modification and photoluminescence in CaS:Bi

nanophosphors, Vinay Kumar, Ravi Kumar, S.P. Lochab and Nafa Singh, J. of

Nanoparticle Research 9, 661-667 (2007).

118. “Effect of swift heavy ion irradiation on the surface morphology of highly

c-axis oriented LSMO thin .lms grown by pulsed laser deposition” M.S. Sa-

hasrabudhe, Deepak N. Bankar, A.G. Banpurkar, S.I. Patil, K.P. Adhi, Ravi Ku-

mar, Nucl. Instrum. Meth. Phys. B263, 407 (2007).

119. “Magnetic study of Mg0.95Mn0.05Fe2O4 ferrite nanoparticles”. S.K. Sharma,

Ravi Kumar, Shalendra Kumar, V.V. Siva Kumar, M. Knobel, V.R. Reddy, A.

Banerjee and M. Singh, Solid State Communications 141, 203 (2007).

120. “Swift heavy ion induced modification and photoluminescence in CaS:Bi

nanophosphors, Vinay Kumar, Ravi Kumar, S.P. Lochab and Nafa Singh, J. of

Nanoparticle Research 9, 661-667 (2007).

121. “Magnetic study of Mg0.95Mn0.05Fe2O4 ferrite nanoparticles”. S.K.

Sharma, Ravi Kumar, Shalendra Kumar, V.V. Siva Kumar, M. Knobel, V.R.

Reddy, A. Banerjee and M. Singh, Solid State Communications 141, 203 (2007).

2006

122. “Swift heavy ion irradiation induced enhancement in electrical conductiv-

ity of chemical solution deposited La0.7BaMnO3 thin films”. R.N. Parmar, J.H.

Markana, D.G. Kuberkar, Ravi Kumar, D.S. Rana, V.C. Bagve and S.K. Malik,

Appl. Phys. Lett. 89, 202506 (2006).

123. ”Single Phase formation of Co-implanted ZnO thin films by swift heavy

ion irradiation: Optical studies”. Ravi Kumar, F. Singh, B. Angadi, J.W. Choi,

W.K. Choi, K. Jeong, J.H. Song. M. Wasi Khan, J.P. Srivastava, Ajay Kumar and

R.P. Tandon, J. Appl. Phys. 100, 113708 (2006).

124. “Swift heavy ion irradiation induced modifications in structural, magnetic

and electrical properties of Epitaxial magnetite thin films”. Ravi Kumar, M.

Wasi Khan, J.. Srivastava, S.K. Arora, R.G.S. Sofin, R.. Choudhary and I.V.

Shvets, J. Appl. Phys. 100, 033703 (2006).

125. “Ferromagnetic Properties of Co and Fe implanted ZnO thin films at

room temperature”. W.K. Choi, B. Angadi, H.C. Park, J.H. Lee, J.H. Song and

Ravi Kumar, Adv. Sci. & Tech. 52, 42 (2006).

126. “Ferromagnetism in 200-MeV Ag+15-ion-irradiated Co-implanted ZnO

thin films”, Basavaraj Angadi,Y. S. Jung, Won-Kook Choib, Ravi Kumar, K.

Jeong, S. W. Shin, J. H. Lee, J. H. Song, M. Wasi Khan and J. P. Srivastava,

Appl. Phys. Lett. 88, 142502 (2006).

127. ”Thickness dependent swift heavy ion irradiation effects on electronic

transport of (La0.5Pr0.2)Ba0.3MnO3 thin films” , J. H. Markna, R. N. Parmar, D. G.

Kuberkar, Ravi Kumar, D.S.Rana, and S.K.Malik , Appl. Phys. Lett. 88, 152503

(2006).

128. “Thermoluminescence studies of CaS:Bi nanocrystalline phosphors”.

Vinay Kumar, Ravi Kumar, S.P. Lochab and Nafa Singh, J. Phys. D: Appl. Phys.

39, 5137 (2006).

129. “Study on the electrical and dielectric behaviour of Zn-substituted cobalt

ferriauminates”. N.H. Vasoya, V.K. Lakhani, P.U. Sharma, K.B. Modi, Ravi Ku-

mar and H.H. Joshi, J. Phys.: Condens. Matter, 18, 8063 (2006).

130. “Synthesis and characterization of bismuth doped calcium sulfide

nanocrystallites”. Vinay Kumar, Nafa singh, Ravi Kumar and S.P. Lochab, J.

Phys.: Condens. Matter 18, 5029 (2006).

131. “Mössbauer and magnetic studies of multiferroic Mg0.95Mn0.05Fe2-2xTi2xO4

system”, Shalendra Kumar, Alimuddin, Ravi Kumar, Anjana Dogra, V. R.

Reddy and A. Banarjee, J. Appl. Phys. 99, 08M910 (2006).

132. “Thermoluminescence and Dosimetric properties of bismuth doped CaS

nanocrystalline phosphors, Radiat. Eff. Def. Solids vol. 161 (8) (2006) 479-485.

133. “Modifications in magnetic anisotropy of M—type strontium hexaferrite

crystals by swift heavy ion irradiation”, Balwinder Kaur, Monita Bhat, F. Licci,

Ravi Kumar, S.D. Kulkarni, P.A. Joy, K.K. Bamzai and P.N. Kotru, J. Magn.

Magn. Mater, (2006).

134. “Role of electronic energy loss on the magnetic properties of Mg0.95M-

n0.05Fe2O4 nanoparticles”, S.K. Sharma , Ravi Kumar, V.V. Siva Kumar, M.

Knobel, V.R. Reddy,A. Gupta, M. Singh , Nuclear Instruments and Methods in

Physics Research B 248 (2006) 37–41.

135. “Swift heavy ion induced modification on the dielectric behaviours of

pure and doped TGS crystals”, P.K. Bajpai, Deepak Shah, Ravi Kumar, Nucl. In-

strum. Meth. Phys. B244 (2006) 264.

136. “Effect of 200 MeV Ag ion irradiation on pink noise and magneto-trans-

port properties of La0.7Ce0.3MnO3 thin films”, R.J. Choudhary, Ravi Kumar,

Shahid Husain, J.P. Srivastava, S.K. Malik, S.I. Patil, Nucl. Instrum. Meth. Phys.

B244 (2006) 268.

137. “Swift ion irradiation induced changes in the structural and transport

properties of La0.7Sr0.3MnO3 thin films”, M.S. Sahasrabudhe, K.P. Adhi, S.S.

Harchirkar, A.V. Deshmukh, S.I. Patil, Ravi Kumar, Nucl. Instrum. Meth. Phys.

B244 (2006) 333.

138. “Swift heavy ions irradiation studies on some ferrite nanoparticles”, B.

Parvatheeswara Rao, K.H. Rao, P.S.V. Subba Rao, A. Mahesh Kumar, Y.L.N.

Murthy, K. Asokan, V.V. Siva Kumar, Ravi Kumar, N.S. Gajbhiye, O.F. Caltun,

Nucl. Instrum. Meth. Phys. B244 (2006) 27.

139. “Modifications of electronic transport behaviour of 250 MeV Ag ion irra-

diated La0.75Ca0.25MnO3 thin films”, Ravi Kumar, F. Singh, R.J. Choudhary, S.I.

Patil, Nucl. Instrum. Meth. Phys. B244 (2006) 110.

140. “Influence of 50 MeV Li3+-ion irradiation on structural and magnetic prop-

erties of Ti4+-substituted Li0.5Al0.1Fe2.4O4”, M.C. Chhantbar, K.B. Modi, G.J.

Baldha, H.H. Joshi, R.V. Upadhyay, Ravi Kumar, Nucl. Instrum. Meth. Phys.

B244 (2006) 124.

141. “Unusual metal-like state in HTSC and CMR oxides”, S. Chattopadhyay,

Ravi Kumar, A. Sarkar, Nucl. Instrum. Meth. Phys. B244 (2006) 132.

142. “Photoluminescence and UV–vis studies of pre- and post-irradiated sap-

phire with 200 MeV Ag8+ ions”, K.S. Jheeta, D.C. Jain, Fouran Singh, Ravi Ku-

mar, K.B. Garg, Nucl. Instrum. Meth. Phys. B244 (2006) 187.

143. “Effect of 50 MeV Li3+ ion irradiation on polycrystalline MgB2 supercon-

ductor”, A. Talapatra, S.K. Bandyopadhyay, Pintu Sen, Ravi Kumar, P. Mukher-

jee, P. Barat, Nucl. Instrum. Meth. Phys. B244 (2006) 261.

144. “Dielectric characteristics of HoFeO3 crystals and their modification on

SHI irradiation”, Monita Bhat, Balwinder Kaur, Ravi Kumar, S.K. Khosa, K.K.

Bamzai, P.N. Kotru, B.M. Wanklyn, Nucl. Instrum. Meth. Phys. B245 (2006)

480.

145. “Optical properties in the Cu-fused silica system irradiated with swift

heavy ions”, Ranjana C. Gupta, D.C. Kothari, R.J. Choudhari, Ravi Kumar, P.K.

Sahoo, K.P. Lieb, S. Klaumu¨nzer, Nucl. Instrum. Meth. Phys. B245 (2006) 219.

146. “Swift heavy ion irradiation induced modifications in structural, magnetic

and electrical transport properties of epitaxial magnetite thin films.” Ravi

Kumar, M. Wasi Khan, J.P. Srivastava, S.K. Arora, R.G.S. Sofin, R.J.

Choudhary and I.V. Shvets, J. Appl. Phys. 100, (2006) proof copy.

2005

147. “Radiation damage effect in CMR manganite materials". S. Chattopad-

hyay, Sudipta Pal, A. Sarkar, Ravi Kumar and B.K. Chaudhuri, Nucl. Instrum.

Meth. Phys. B230 (2005) 274.

148. “Interesting aspects of the analysis of resistivity in Li ion irradiated Bi-

2212". A. Sarkar, S. Chattopadhyay, Ravi Kumar and Udayan De, Nucl. Instrum.

Meth. Phys. B230 (2005) 284.

149. “Swift heavy ion induced mixing of Fe/Ni multilayers". S.K. Srivastava,

Ravi Kumar, R.S. Patel, A.K. Majumdhar, A. Gupta and D.K. Avasthi, Nucl. In-

strum. Meth. Phys. B243 (2005) 304.

150. “Swift heavy ion irradiation induced modifications in structural and mag-

netic properties of nano-particles of Mg-Mn ferrites". Ravi Kumar, S.K. Sharma,

Anjana Dogra, A. Gupta, A. Saraiya, V.V. Siva Kumar and M. Singh, Hyperfine

Interactions (2005) 160:143-156.

151. “Effect of ion irradiation on dielectric and mechanical characteristics of

ErFeO3 single crystals”, Monita Bhat, Balwinder Kaur, Ravi Kumar, K.K.

Bamzai, P.N. Kotru , B.M. Wanklyn, Nucl. Instrum. Meth. Phys. B234 (2005)

494.

152. “Modifications in the mechanical characteristics of YFeO3 crystals on ir-

radiation”, Monita Bhat, Balwinder Kaur, Ravi Kumar, K.K. Bamzai, P.N. Kotru

and B.M. Wanklyn, Material Chemistry and Physics, vol 93, issue 2-3, 255

(2005).

153. “Magnetic nanoparticles for space applications". S.K. Sharma, Ravi Ku-

mar, S.N. Dolia, V.V. Siva Kumar and Mahavir Singh, Proceedings of Materails

Research Society 851 (2005) NN10.4

154. “Au ion induced modifications in C60 thin films". Navdeep Bajwa, Alka

Ingale, D.K. Avasthi, Ravi Kumar, A. Tripathi, K. Dharmvir, V.K. Jindal,

Michael Schmitt and W. Kiefer, Proceedings of Materails Research Society 851

(2005) NN9.7.

155. “Swift heavy ion irradiation effects on structural and magnetic character-

istics of RFeO3 (R= Er, Ho and Y) crystals”, Monita Bhat, Balwinder Kaur, Ravi

Kumar, P.A. Joy, S.D. Kulkarni, K.K. Bamzai, P.N. Kotru, B.M. Wanklyn, Nucl.

Instrum. Meth. Phys. B243 (2006) 134.

156. “Enhanced magnetic and bolometric sensitivity of La0.7Ce0.3Mn3 thin

films due to 200 MeV Ag ion irradiation” R.J. Choudhary Ravi Kumar, S.I.

Patil, Shahid Husain, J.P. Srivastava, S K Malik, Appl. Phys. Lett. 86, 222501

(2005).

157. “Exposition of semiconducting and ferromagnetic properties of pulsed

laser deposited thin films of LaFe1-xNixO3 (x= 0.3, 0.4 and 0.5)". R.J. Choudhary,

Ravi Kumar, M. Wasi Khan, J.P. Srivastava, S.I. Patil, S.K. Arora and I.V.

Shvets, Appl. Phys. Lett. 87,132104 (2005).

158. "Photoluminescence studies of 200 MeV Ag ion irradiated Co-implanted

ZnO thin films". Basavraj Angadi, Y.S. Jung, Won-Kook Choi, Ravi Kumar, F.

Singh K. Jeong, J.H. Lee, J.H. Song, M. Wasi Khan and J.P. Srivastava, Appl.

Phys. Lett. (2005) submitted.

159. “Influence of anti phase boundary (APB) density on conduction noise

properties of epitaxial thin Fe3O4 thin films". S.K. Arora, Ravi Kumar, M. Wasi

Khan, J.P. Srivastava, R.G.S. Sofin and I.V. Shevets, J. Appl. Phys. 97 (2005)

10C310.

160. “Structural, electrical transport and x-ray absorption spectroscopy studies

on LaFe1-xNixO3 (x = 0 to 0.6)". Ravi Kumar, R.J. Choudhary, M. Wasi Khan,

J.P. Srivastava, K. Asokan, C.W. Bao, H.M. Tsai and W.F. Pong, J. Appl. Phys.

97 (2005) 093526.

2004

161. "Columnar tilt and vortex stress in superconducting thin films of Nd-

Ba2Cu3O7-y: magnetization critical current density measurements". Sanghamitra

Khatua, P.K. Mishra, Ravi Kumar, D.C. Kundaliya, D. Buddhikot, R. Pinto and

S.K. Malik, J. Appl. Phys. 96 (2004) 7403.”

162. "Evaluation of manganite films on silicon for uncooled bolometer

applications". R.J. Choudhary, Anjali S. Ogale, S.R. Shinde, S. Hullavarad, S.B.

Ogale, T. Venkatesan, R.N. Bathe, S.I. Patil and Ravi Kumar, Appl. Phys. Lett.

84 (2004) 3846.

163. "Structural, electrical, magnetization and 1/f studies in 200MeV Ag ion

irradiated La0.7Ce0.3MnO3 thin films". Ravi Kumar, R.J. Choudhary, S.I. Patil,

Shahid Husain, J.P. Srivastava, S.P. Sanyal and S.E. Lofland, J. Appl. Phys. 96

(2004) 7383.

164. "Swift heavy ion iduced modifications of C60 thin films". Navdeep

Bajwa, K. Dharamvir, V.K. Jindal, Alka Ingale, D.K. Avasthi, Ravi Kumar and

A. Tripathi, J. Appl. Phys. 94 (2003) 326.

165. "190 MeV Ag ion beam irradiation effect on structural and magnetic

properties of NiMn0.05Mg0.2Ti0.2Fe1.55O4 thin films". Anjana Dogra, Ravi Kumar,

V.V. Siva Kumar, N. Kumar and M. Singh, Ninth International Conference on

Ferrites (ICF-9) (2004) 131.

166. "Study of the effect of swift heavy Fe ion irradiation on ruby crystal using

the XANES technique" D.M. Bhardwaj, D.C. Jain, Ravi Kumar and K.B. Garg,

Physica B352 (2004) 318-324.

167. "Effect of Li ion irradiation on transport properties of La0.7Pb0.3MnO3 type

CMR materials". S. Chattopadhyay, A. sarkar, A. Banerjee, S. Karmkar, D.

Banerjee, Ravi Kumar and B.K. Choudhary, Nucl. Instrum. Meth. Phys. B226

(2004) 274.

168. "Magnetic study of substituted Mg-Mn ferrites synthesized by citrate

precursor method". B.S. Chauhan, Ravi Kumar, K.M. Jadhav and M. Singh, J.

Mag. Magn. Mater. 283 (2004) 71.

169. "Influence of 190 MeV Ag ion irradiation on structural, magnetic and

oxygen content of NiMn0.05TixMgxFe1.95-2xO4 (x= 0.0, 0.2) ferrite thin films".

Anjana Dogra, Ravi Kumar, S.A. Khan, V.V. Siva Kumar, N. Kumar and M.

Singh, Nucl. Instrum. Meth. Phys. B225 (2004) 283.

170. "Mossbauer stidy of 50 MeV Li ion irradiated Mg0.9Mn0.1InxFe2-xO4

ferrite". M. Singh, Anjana Dogra and Ravi Kumar, Mat. Res. Soc. Symp. Proc.

792 (2004) R3.14.1

171. "Photoluminescence and atomic force microscoy studies of pre- and post-

irradiated ruby with Fe ions". D.M. Bhardwaj, D.C. Jain, K.B. Garg, Ravi

Kumar, Fouran sing and R.P. Gupta, Radiation Effects & Decfects in Solids 159

(2004) 315.

172. "Electron and hole doping effects on electronic structure of manganite

studied by x-ray absorption spectrocopy". K. Asokan, J.C. Jan, K.V.R. Rao, J.W.

Chiou, H.M. Tsai, S. Mookerjee, W.F. Pong, M-H Tsai, Ravi Kumar, Shahid

Husain and J.P. Srivastava, J. Phys. Condensed Matter 16 (2004) 3791.

173. "Effect of 50 MeV Li ion irradiation on mechnaical characteristics of pure

and Ga-In substituted M-type strontium hexaferrite". Balwinder Kour, Monita

Bhat, F. Licci, Ravi Kumar, P.N. Kotru and K.K. Bamzai, Nucl. Instrum. Meth.

Phys. B222 (2004) 175.

174. "Structural and magnetic studies of NiMn0.05TixMgxFe1.95-2xO4 ferrite".

Anjana Dogra, Ravi Kumar, N. Kumar, P. Sen and M. Singh, Materila Sci. Engg.

B110 (2004) 243.

175. "Photoluminescence and atomic force microscopy studies on pre- and post

irradiated ruby with Ni ions". D.M. Bhardwaj, D.C. Jain, K.V.R. Rao, Ravi

Kumar, Fouran Singh and R.P. Gupta, Nucl. Instrum. Meth. Phys. B222 (2004)

533.

176. "Study of the effect of swift heavy Ni ion irradiation on ruby single

crystals using the XANES and EXAFS techniques". D.M. Bhardwaj, D.C. Jain, S.

Dalela, Ravi Kumar, N.L. Saini and K.B. Garg, Physica B350 (2004) 366.

2003

177. "Mossbauer studies of 190 MeV Af ion irradiated NiMn0.05TixMgxFe1.95-

2xO4 ferrite"Anjana Dogra, S.K. Srivastava, M. Singh, N. Kumar, P. Sen and Ravi

Kumar, Radiation Measurements 36 (2003) 667.

178. "Study of 200MeV Ag ion irradiation effects on the stochiometry of La-

2125 type superconducting thin films using ERDA". K.R. Mavani, S. Rayaprol,

D.S. Rana, C.M. Thaker, D.G. Kuberkar, J. John, R. Pinto, S.V.S. Nageswara

Rao, S.A. Khan, S.K. Srivastava, A. Dogra, Ravi Kumar and D.K. Avasthi,

Radiation Measurements 36 (2003) 733.

179. "Mossbauer studies of 190 MeV Af ion irradiated NiMn0.05TixMgxFe1.95-

2xO4 ferrite"Anjana Dogra, M. Singh, N. Kumar, P. Sen and Ravi Kumar, Nucl.

Instrum Meth. Phys. B212 (2003) 190.

180. "Irradiation effect on dielectric properties of NiMn0.05Tix(Zn,Mg)xFe1.95-

2xO4 ferrite thin films". Anjana Dogra, M. Singh, V.V. Siva Kumar, N. Kumar and

Ravi Kumar, Nucl. Instrum Meth. Phys. B212 (2003) 184.

181. "Radiation resistance of PFN and PMN-PT relaxor ferroelectrics".

Basavaraj Angadi, V.M. Jali, M.T. Lagare, V.V. Bhat, A.M. Umarji and Ravi

Kumar, Radiation Measurements 36 (2003) 635.

182. "Photoluminescence studies on pre and post irradiated ruby". D.M.

Bhardwaj, D.C. Jain, K.V.R. Rao, Ravi Kumar and K. Asokan, Indian J. Pure &

Appl. Phys. 41 (2003) 498.

183. "50 MeV Li ion irradiation induced modifications in dielectric properties

of Al substituted Mg-Mn ferrite". Anjana Dogra, M. Singh and Ravi Kumar,

Nucl. Instrum Meth. Phys. B207 (2003) 296.

184. "High energy Li ion irradiation effect in ferroelectric PZT and SBT films".

Basavraj Angadi, P. Victor, V.M. Jali, M.T. Lagare, Ravi Kumar and S.B.

Krupanidhi, Thin Solid Films 434 (2003) 40.

185. "AC conductivity studies on Li irradiated PZT and SBT ferroelectric thin films".

Basavraj Angadi, P. Victor, V.M. Jali, M.T. Lagare, Ravi Kumar and S.B.

Krupanidhi, Mater. Sci. Engg. B100 (2003) 93.

2002

186. "Study of structural and electronic properties of Ce doped LaMnO3". Shahid

Husain, R.J. Choudhary, Ravi Kumar, S.I. Patil and J.P. Srivastava, Pramana J.

Phys. 58 (2002) 1045.

187. "Electronic structure studies of La0.7Ca0.3MnO3 and La0.7Ce0.3MnO3 by x-ray

absorption spectroscopy" K. Asokan, J.C. Jan, J.W. Chiou, W.P. Pong, Ravi

Kumar, Shahid Husain and J.P. Srivastava, Surface Rev. Lett. 9 (2002) 1053.

188. "A Comparative study of magnetotransport and magnetization in epitaxial

La0.6Nd0.2Ca0.2MnO3 unirradiated and heavy ion irradiated thin films." D.C.

Kundaliya, A.A. Tulapurkar, R. Pinto, Ravi Kumar and R.G. Kulkarni, Solid

State Communications 122 (2002) 419.

189. "Long Columns and vortex mobility: a case study in NBCO thin films".

Sanghamitra Khatua, P.K. Mishra, Ravi Kumar, V.C. Sahni and R. Pinto,

Superconductors Science & Technology 15 (2002) 324.

190. "Li3+ irradiation effect on the thermal expansion of Ca1-xSrxZr4P6O24". Basavraj

Angadi, V.M. Jali, M.T. Lagare, N.S. Kini, A.M. Umarji, Ravi Kumar, S.K.

Arora and D. Kanjilal, Nucl. Inst. Meth. in Phys. B187 (2002) 87.

191. "Boson localization and Mott insulator phase in NBCO thin films". Sanghamitra

Khatua, P.K. Mishra, Ravi Kumar, V.C. Sahni and R. Pinto, J. Phys. D Appl.

Phys. 34 (2002) 3327.

2001

192. Effect of Li ion irradiation on the transport and optical properties of

Bridgman grown n-type InSb single crystals". V.K. Dixit, B.V. Rodrigues, H.L.

Bhat, Ravi Kumar, R. Venkataragvan, K.S. Chandrasekharan and B.M. Arora, J.

Appl. Phys. 90 (2001) 1750.

193. "Grey track formation in KTiOPO4 by swift heavy ion irradiation". A.

Deepthy, K.S.R.K. Rao, H.L. Bhat, Ravi Kumar and K. Asokan, J. Appl. Phys.

89 (2001) 6560.

2000

194. "Columnar defect induced phase transformation in epitaxial La0.7 Ca0.3

MnO3 films". S.B. Ogale, Y.H. Li, M. rajeshwari, L. Salamanca Riba, R. Ramesh,

T. Venkatesan, A.J. Millis, Ravi Kumar, G.K. Mehta, Ravi Bathe and S.I. Patil,

J. Appl. Phys. 87 (2000) 4210.

195. "Positron lifetime studies of 100MeV Oxygen ion irradiated Pb doped Bi-2223

superconductors". T. Banerjee, R.N. Viswanath, D. Kanjilal, Ravi Kumar and S.

Ramasamy, Solid State Communications 114 (2000) 655.

196. "Bose-glass phase in crossed heavy ion irradiated YBa2Cu3O7-y". Ujjual Divakar,

G.L. Bhalla and Ravi Kumar, Nucl. Inst. & Meth in Phys. Res. B171 (2000) 309.

197. "Fluctuation induced conductivity studies of 100MeV Oxygen ion irradiated Pb

doped Bi-2212 superconductors". Tamalika Banerjee, Ravi Kumar, D. Kanjilal

and S. Ramasamy, Physica C341-348 (2000) 1185.

198. "Swift heavy ion irradiation and fish tail magnetization in NBCO thin films- the

cause and effect". Sanghamitra Khatua, P.K. Mishra, D.G. Kulkarni, Ravi

Kumar, J. John, V.C. Sahni and R. Pinto, Superconductors Science &

Technology 13 (2000) 259.

1999

199. "Swift heavy ion-based materials science research at NSC". J.P. Singh, R. Singh,

S. Ghosh, A. Tripathi, D. Kabiraj, T. Som, Ravi Kumar, S.K. Arora, K. Asokan,

D.K. Avasthi, D. Kanjilal, N.C. Mishra and G.K. Mehta, Nucl. Inst. Meth. in

Phys. B156 (1999) 206.

200. "Irradiation effects on the dielectric properties of selected barium sodium niobate

ceramics". Jaimon Yohannan, Ravi Kumar and K. Nandakumar, Nucl. Inst.

Meth. in Phys. B156 (1999) 227.

201. "Effect of 250 MeV Ag ion irradition on superconductivity in Dy-123 thin

films". A. Radhika Devi, V. Sheshubai, P.V. Patanjali, R.Pinto, N. Harish Kumar,

S.K. Malik and Ravi Kumar, Nucl. Inst. Meth. in Phys. B156 (1999) 54.

202. "X-ray, resistivity and AC susceptibility studies of 100 MeV O ion irradiated

polycrystalline Bi2223". Tamalika Bandyopadhyay, Ravi Kumar, D. Kanjilal,

S.B. Samanta, Anurag Gupta, A.V. Narlikar and S. Ramasamy, Nucl. Inst. Meth.

in Phys. B156 (1999) 58.

203. "Vortex dynamics of 250 MeV Ag ion irradiated YBCO thin films".

Sanghamittra Khatua, Ravi Kumar, P.K. Mishra, V.C. Sahni and R. Pinto, Nucl.

Inst. Meth. in Phys. B156 (1999) 44.

204. "Angular dependence of magnetotransport properties in YBCO films with

columnar defects". G.L. Bhalla, Ujjual Divakar, G.C. Trigunayat, Ravi Kumar,

D. Kanjilal and G.K. Mehta, Nucl. Inst. Meth. in Phys. B156 (1999) 40.

205.Group In-charge "AC susceptibility and STM studies on Bi2212 single

crystals irradiated with heavy ions". Anurag Gupta, Ahmed Sedky, S.B. Samanta,

Md. Shahbuddin, Ravi Kumar and A.V. Narlikar, Nucl. Inst. Meth. in Phys.

B156 (1999) 35.

206. "Enhancement and degredation of Tc in Bi-HTSC due to Li and He ion

irradiations". Udayan De, A. Sarkar, D. Sanyal, Ravi Kumar and D. Benerjee,

Nucl. Inst. Meth. in Phys. B156 (1999) 54.

207. "Role of Swift heavy ion irradiation in flux dynamics of High temperature

superconducting thin films". Ravi Kumar, S.K. Arora, R. Pinto, A. Radhika

Devi, V. Sheshubai, S.B. Samanta, A.V. Narlikar, G.L. Bhalla and Ujjual

Divakar, IETE Jouranal of Research 45 (1999) 203.

208. "Electronic transport and conduction noise studies on 250 MeV Ag ion

irradiated LCMO thin films". S.K. Arora, Ravi Kumar, Rajendra Singh, Ravi

Bathe, S.I. Patil, S.B. Ogale, D.Kanjilal and G.K. Mehta, J. Appl. Phys. 86 (1999)

4452.

209. "In situ 1/f noise study of SHI irradiated p-type Si". S.K. Arora, Rajendra Sing,

Ravi Kumar, D. Kanjilal and G.K. Mehta, Nucl. Inst. & Methods Phys. Res.

B156 (1999) 265.

210. "1/f noise properties of swift heavy ion irradiated epitaxial YBCO thin films".

S.K. Arora, Ravi Kumar, D. Kanjilal, G.K. Mehta, S. Khatua, R. Pinto, Vijay

Kumar and A.K. Gupta, Bull. Mater. Sci. 22, (1999) 101.

1998

211. "1/f noise properties of La1-x CaxMnO3 thin films". S.K. Arora, Ravi Kumar, D.

Kanjilal, Ravi Bathe, S.I. Patil, S.B. Ogale and G.K. Mehta, Solid State

Communications 108 (1998) 959.

212. "Influence of 90 MeV oxygen ion irradiation ion induced disorder on

magnetotransport in epitaxial La0.7 Ca0.3 MnO3 thin films". S.B. Ogale, K. Ghosh,

J.Y Gu, R. Shreekala S.R. Shinde, M. Downes, M. Rajeswari, R.P. Sharma, R.L.

Greene, T. Venkatesan, R. Ramesh, Ravi Bathe, S.I. Patil, Ravi Kumar, S.K.

Arora and G.K. Mehta, J. Appl. Phys. 84 (1998) 6255.

213. "Swift heavy ion irradiation effects on transport properties of epitaxial thin

films of La1-x CaxMnO3". Ravi Kumar, S.K. Arora, D. Kanjilal, G.K. Mehta, Ravi

Bathe, S.K. Date, S.R. Shinde, L.V. Saraf, S.B. Ogale and S.I. Patil, Rad. Eff. &

Diff. in Solids 147 (1998) 187.

214. "90 MeV O ion irradiation effect on transport and magnetization in epitaxial

thin films of La0.75 Ca0.25 MnO3". Ravi Bathe, S.K. Date, S.R. Shinde, L.V. Saraf,

S.B. Ogale, S.I. Patil, Ravi Kumar, S.K. Arora and G.K. Mehta, J. Appl. Phys.

83 (1998) 7174.

215. "Study of columnar amorphization and structural symmetry changes produced

by swift heavy ion irradiation in YBa2Cu3O7-y thin films". Ravi Kumar, S.B.

Samata, S.K. Arora, Anurag Gupta, D. Kanjilal, R.Pinto and A.V. Narlikar, Solid

State Communications 106 (1998) 805.

1994

216. "Field-cooled magnetization of High-Tc single crystals: thermal history effects".

A.A. Zhukov, A.V. Volkozub, P.A.J. de Groot, Ravi Kumar and A.J.S.

Chowdhury, Physica C235-240 (1994) 2911.

1993

217. "Local magnetization of Rh in Ni-Rh alloys near the critical composition for

ferromagnetism". V.V. Krishnamurthy, S.N. Mishra, Ravi Kumar, S.H. Devare

and H.G. Devare, Hyperfine Interactions 78 (1993) 541.

218. "Study of some Ce intermetallics by core-level photoemission". R.K. Singhal,

N.L. Saini, K.B. Garg, J. Kanski, L. Ilver, P.O. Nelsson, Ravi Kumar and L.C.

Gupta, J. Phys.: Condens. Matter 5 (1993) 4013.

219. "Flux creep in YBa2Cu3O7-y thin films induced by self field due to transport

current". Ravi Kumar, S.K. Malik, R. Pinto and R. Vijayaraghavan, Applied

Superconductivity 1 (1993) 1061.

220. "Intercalation of Bi and Tl based oxides with conjugate ring shaped organic

molecules: x-ray, Raman scattering, EPR and magnetization studies". L.S.

Grigoryan, Ravi Kumar, S.K. Malik, R. Vijayaraghavan, M.D. Shastri, Ajay

Kumar and H.D. Bist, Physica C205 (1993) 1061.

1992

221. "Non-linear response of YBa2Cu3O7-y thin film microstrip resonator at

microwave frequencies". R. Pinto, Ravi Kumar, Navdeep Goyal, P.R. Apte, S.P.

Pai and S.K. Malik, Solid State Communications 84 (1992) 1107.

222. "Effect of benzene intercalation on magnetization of Bi-oxide based

superconductors". L.S. Grigoryan, Ravi Kumar, S.K. Malik, R. Vijayaraghavan

and A.R. Harutyunyan, Physica C198 (1992) 137.

223. "Nuclear Magnetic Resonance of Tl in superconducting TlBa2-xLaxCuO5-y". A.K.

Rajarajan, A. Sundaresan, Ravi Kumar, M. Sharon, L.C. Gupta and R.

Vijayaraghavan, J. Phys.: Condensed Matter 4 (1992) 6771.

224. "Study of self-field induced flux creep in YBa2Cu3O7-y thin films". Ravi

Kumar, S.K. mailik, S.P. Pai, R. Pinto, P.R. Apte, R. Vijayaraghavan and

Dhanajay Kumar, Phys. Rev. B46 (1992) 5766.

225. "Magnetization and magneto-resistance study to elucidate the antiferro to

ferromagnetic transition in Ce(Fe0.95Ru0.05)2". B.V.B. Sarkissian, A.K. Grover,

R.G. Pillay, G. Balakrishnan, Ravi Kumar and P.N. Tandon, J. Magnetism and

Magnetic Materials 104-107 (1992) 1271.

226. "High field magnetization studies in YBa2Cu4O8 superconductors". Ravi

Kumar, R. Walia, M. Oussena, P.A.J. de Groot, P.C. Lanchester, D. Currie and

M. Weller, Solid State Communications 89 (1994) 783.

227. "Effect of thermomagnetic history of field cooled magnetization on

irreversibility line in conventional and hugh-Tc superconductors". Ravi Kumar,

A.V. Volkozub, P.A.J. de Groot, A.K. Grover and S.K. Malik, Physica B194-196

(1994) 1857.

228. "Determination of irreversibility lines in hard superconductors: path dependence

of field cooled magnetization". Ravi Kumar, C.V. Tomy, A.K. Grover and S.K.

Malik, Applied Superconductivity 1 (1993) 1115.

229. "Magnetization sudies in Nb and YBa2Cu3O7-y samples". B.V.B. Sarkissian,

A.K. Grover, G. Balakrishnan, Ravi Kumar, P.L. Paulose, R. Vijayaraghavan, V.

Shankarnaryanan and C.K. Subramainan, Pramana-J. of Phys. 38 (1992).

230. "Scope and limitations of DC and AC magnetization techniques to locate

irreversibility line in conventional superconductors". A.K. Grover, S.

Ramakrishnan, Ravi Kumar, P.L. Paulose, G. Chandra, S.K. Malik and P.

Chaddah, Physica C192 (1992) 372.

1991

231. "Search for irreversibility line in a hard superconductors". Ravi Kumar, A.K.

Grover, S. Ramakrishnan, P.L. Paulose, S.K. Malik and P. Chaddah, Physica

C185-189 (1991) 2265.

232. "Comparison of irreversibility temperature determined via DC and AC

magnetization techniques in conventional superconductors". A.K. Grover, S.

Ramakrishnan, Ravi Kumar, P.L. Paulose, S.K. Malik and P. Chaddah, Pramana-

J. Phys. 37 (1991) 525.

233. "Hierarchy of quasi-irreversibility lines in niobium". C.V. Tomy, Ravi Kumar

and A.K. Grover, Solid State Communications 80 (1991) 117.

234. "Comparison of various methods to experimentally determine the irreversibility

line in superconductors". S. Ramakrishnan, Ravi Kumar, P.L. Paulose, A.K.

Grover and P. Chaddah, Phys. Rev. B44 (1991) 9514.

235. "An exposition of inhomogeneous magnetic states in type-I and type-II

superconductors". A.K. Grover, Ravi Kumar, S.K. Malik and P. Chaddah, Solid

State Communications 77 (1991) 723.

236. "Quasi-irreversibility temperature in type-I superconductor". A.K. Grover, Ravi

Kumar, S.K. Malik and P. Chaddah, Phys. Rev. B43 (1991) 6151.

1990

237. "A reappraisal of irreversible behaviour in the intermediate state of type-I

superconductor". A.K. Grover, Ravi Kumar, P. Chaddah, C.K. Subramanian and

V. Shankaranarayanan, Physica C170 (1990) 431.

238. "Measurements of Higher multipole moments of an inhomogeneous magnetic

state of a superconductors". Ravi Kumar, A.K. Grover, P. Chaddah, C.K.

Subramanian and V. Shankaranarayanan, Solid State Cmmunications 76 (1990)

175.

239. "Growth and stabiliaztion of laser ripples on laser beam in a collision less

unmagnetized plasma". Ravi Kumar, K. Singh and T. Singh, Nuovo Cimento

12D (1990) 323.

Research Articles in Edited Books:

1. "A Study of reversible and irreversible magnetization behaviour in conventional superconductors". S. Ramakrishnan, Ravi Kumar, C.V. Tomy, A.K. Grover, S.K. Malik and P. Chaddah, in Magnetic Suceptibility of Superconductors and other Spin systems, Edited by R.A. Hein, T.L. Francavilla and D.H. Liebenberg, (Plenum Press New York U.S.A. 1992) Page No. 389.

2."Measurements of Inhomogeneous magnetic states and irreversibility line in type-I and type-II superconductors". Ravi Kumar, S. Ramakrishnan and A.K. Grover, in High Temperature Superconductors Materials and Theory, Edited by S.K. Malik and S.S. Shah, (Nova Science Publisheres Inc. U.S.A. 1992) Page 421.

3."Dependence of field-cooled magnetization of Bi2212 and Tl2212 single crystals on temperature history". A.A. Zhukov, A.V. Volkozub, P.A.J. de Groot, Ravi Kumar and A.J.S. Chowdhury, in Critical currents in Superconductors, Edited by H.W. Webber (World Scientific. 1994) page 133.

4. "Role of swift heavy ion irradiation in flux dynamics of high-Tc superconducting thin films". Ravi Kumar, S.K. Arora, R. Pinto, A. Radhika Devi, V. Sheshubai, S.B. Samanta, G.L. Bhalla, Ujjual Divakar and A.V. Narlikar, in Advances in superconductivity and its applications in microwave, Edited by G.P. Srivastava and R.P. tandon (Allied Publishers, India, 1998) page 89.

5."Understanding the direction of change in Tc in superconductors due to particle irradiation". Udayan De, A. Sarkar, D. Sanyal, D. Benerjee and Ravi Kumar, in High-Tc Superconductors, Edited by A.K.M.A. Islam, (Condensed Matter Physics, Rajshahi University, Bangladesh, 1998) page 483.

6."Role of Swift heavy ion irradiations in collosal magneto resistance materials". Ravi Kumar, S.K. Arora, Rajendra Singh, F. Singh, R.N. Bathe and S.I. Patil, in Different Disordered Systems, Edited by S.K. Srivastava, K. Furukawa, J.T. Watson and S.N. Saxena, (International Disordered-Systems Associates Society 2000) page 85.

7."Electronic transport studies of La0.5Ce0.5MnO3". Shahid Husain, Ravi Kumar, S.K. Arora, K. Asokan, K.V.R. Rao and J.P. Srivastava,in Different Disordered Systems, Edited by S.K. Srivastava, K. Furukawa, J.T. Watson and S.N. Saxena, (International Disordered-Systems Associates Society 2000) page 93.

8."Swift heavy ion irradiation induced enhancement in flux pinning and some new aspects of flux dynamics in high-Tc superconductors". Ravi Kumar, in Studies of High temperature Superconductors: Irradiation effects and cation disordere in HTS Vol. 47, Edited by Anant Narlikar (Nova Science Publishers, Inc. 2003) pages 97.

9. “Perovskite based colossal magneto resistance materials and their irradiation studies: A review”. Ravi Kumar, R.J. Choudhary and S.I. Patil, in “Radiation effects in Solids”, Edited by S.E. Kurt (Springer, 2006).

Publications in International Conferences

1. “Field dependence of surface resistance and magnetic penetration depth in

YBa2Cu3O7-y microstrip resonators”. R. Pinto, Navdeep Goyal, Ravi Kumar, P.R.

Apte and K. Easwar, 50th Annual Device Research Conference, MIT Boston, MA.

June 22-24, 1992.

2. “Local magnetism of Rh in Ni-Rh alloys near critical composition ferromagnetism”,

V.V. Krishnamurthy, S.N. Mishra, Ravi Kumar, S.H. Devare and H.G. Deware, Pro-

ceedings of IX International Conference on Hyperfine Interaction, August 17-21,

1992 at Osaka Japan.

3. “High field magnetization in YBa2Cu4O8”. R. Walia, Ravi Kumar, M. Oussena,

P.A.J. de Groot, P.C. Lanchester, D. Currie and M. Weller, in Proceedings of Con-

densed Matter and Materials Physics Conference, University of Sheffield, U.K., 15-17

December, 1992.

4. “Irreversibility line in Bi2Sr2CaCu2O8: Effect of thermomagnetic history of field

cooled magnetization”. Ravi Kumar, A.V. Volkozub, P.A.J. de Groot and A.J.S.

Choudhary, in Proccedings of Condensed Matter and Materials Physics Conference,

University of Sheffield, U.K., 15-17 December, 1992.

5. “Effect of thermomagnetic history of field cooled magnetization on the irreversibility

line in conventional and high-Tc superconductors”. Ravi Kumar, A.V. Volozub,

P.A.J. de Groot, S.K. Malik and A.K. Grover, International Conference on Low Tem-

perature Physics (LT-20), 4-11 Agust, 1993, Oregon, USA.

6. “Tl NMR in Superconducting TlBa2-xLaxCuO5-y”. A.K. Rajarajan, Ravi Kumar, A.

Sunderesan, L.C. Gupta, R. Vijayaraghavan and M. Sharon, Proceedings of 10th Inter-

national Ampere Coloqium on magnetic resonance at Zurich University, Zurich,

1991.

7. “200 MeV Au ions irradiation induced modifications on electrical transport properties of La0.7Ce0.3MnO3 thin films”, R. J. Choudhary, Ravi Kumar, Shahid Husain, J. P. Srivastava and S. I. Patil, at International Conference on Advance Studies in Magnetic Materials and Magnetization, ASMM-2D- 2001, Mangalore, India.

8. Growth And Properties Of Pulsed Laser Deposited Fe Doped MoO2+d Thin Films.

Ram Prakash, R. J. Choudhary, D. M. Phase, and Ravi Kumar. AIP Conf.

Proc. 1003, 25 (2008).

9. “Modifications in magnetic properties of BiMn2O5 multiferroic using swift heavy ion irradiation” D. K. Shukla, Ravi Kumar, S. Mollah, R. J. Choudhary, P. Thakur, S. K. Sharma, N. B. Brookes and M. Knobel in International Conference on Magnetism and Magnetic Materials (Intermag MMM) held in Washington DC, USA, Jan 18-22, 2010.

10. “Spin glass behaviour in pulsed laser deposited multiferroic BiMn2O5” D. K. Shukla, Ravi Kumar, S. K. Sharma, R. J. Chaudhary, S. Mollah, M. Knobel in International Conference on Magnetism (ICM) held in Karlsruhe, Germany, July 26 - 31, 2009.

11. Raman Spectroscopic Studies of Co-based Spinel Multiferroic Thin Films  N. E. Ra-

jeevan, Ravi Kumar, D. K. Shukla, R. J. Choudhary, and P. P. Pradyumnan. AIP

Conf. Proc. 1349, 861 (2011).

12. Vinod Kumar, Rajesh Kumar and Ravi Kumar, “Structural and Electrical Properties of NdCo1-

xNixO3 (x = 0, 0.4, 0.5),” in 2nd National Conference on Advanced Materials and Radiation

Physics (AMRP-2011) held on November 4 -5, 2011. at SLIET Longowal, Sangrur (Punjab).

13. Ravi Kumar, Vinod Kumar, Rajesh Kumar, D K Shukla, S K Arora, I V Shevts, “Magnetic Prop-

erties of NdCo1-xNixO3 (x = 0, 0.2, 0.4)”, in 19th International Conference on Magnetism, held

in Busan Korea during 8-13th July 2012.

14. Vinod Kumar, Rajesh Kumar and Ravi Kumar, “Synthesis, Structural and Electrical transport

Properties of LaCo1-xNixO3 (x = 0, 0.1, 0.2)”, in International Conference on Material Science

and Technology (ICMST-2012), held on 10-14 June 2012 at St.Thomas College Pala, Kot-

tayam, Kerala.

15. Ravi Kumar, Vinod Kumar, Rajesh Kumar, D K Shukla, S K Arora, I V Shevts, “Magnetic Prop-

erties of NdCo1-xNixO3 (x = 0, 0.2, 0.4)”, in 19th International Conference on Magnetism, held

in Busan Korea during 8-13th July 2012.

16. Modification in transport properties of NdNiO 3  thin films by substrate induced strain .

Y Kumar, R. J. Choudhary, and Ravi Kumar. AIP Conf. Proc. 1447, 1019 (2012).

17. “Magnetoresistance effect in ferromagnet/superconductor/ferromagnet La0.7S-

r0.3MnO3 /YBa2Cu3O7/La0.7Sr0.3MnO3 heterostructures”, Minaxi Sharma, K. K.

Sharma, Ravi Kumar, R. J. Choudhary and R. Rawat, International Conference and

Workshop on Nano Structured Ceramics & Other Nano Materials ICWNCN-2012,

March 13th-16th 2012, Department of Physics & Astrophysics, University of Delhi,

Delhi, India, Conference Souvenir, LC-073, 2012.

18. “Studies of substrate-induced strain effects in thickness dependent trilayered thin

films”, Minaxi Sharma, K. K. Sharma, Ravi Kumar, 19th International Conference

on Liquid Crystals (NCLC-19), November 21st-23rd 2012, jointly organized by School

of Physics and Materials Science, Thapar University, Patiala and Indian Liquid Crys-

tal Society, India, Conference Souvenir, P-83, pp. 98, 2012.

19. Dielectric Behavior of GdFe1-xNixO3(x ≤ 0.5) at Room Temperature”. Pawanpreet

Kaur, K.K.Sharma, Ravi Kumar, International Conference and workshop on Nano

Structured Ceramics and other Nano Materials (ICWNCN-2012), Department of

Physics and Astrophysics, University of Delhi, March13-16, Conference Souvenir,

LC-072, 248(2012).

20. “Structural properties of GdFe1-xNixO3 (x ≤ 0.2) thin films grown by PLD”. Pawan-

preet Kaur, Rabia Pandit, K.K.Sharma, Ravi Kumar presented in International Con-

ference on Emerging Trends in Physics for Environmental Monitoring & Manage-

ment, held during17-19 December 2012 in Punjabi University, Patiala.

21. Effect of Aluminum Substitution on Structural and Electrical Properties of Cobalt

Ferrites, Rabia Pandit, Pawanpreet Kaur, Minaxi Sharma, K. K Sharma and Ravi

Kumar International Conference and Workshop on Nano Structured Ceramics &

Other Nano Materials (ICWNCN-2012), Department of Physics & Astrophysics, Uni-

versity of Delhi, Delhi, March 13-16, 2012, Conference Souvenir, LC-072, 248

(2012).

22. “Structural and Dielectric Study of Zn2+ Doped Cobalt Ferrite,” Rabia Pandit, 

Pawanpreet Kaur, K. K. Sharma and Ravi Kumar, International Conference on

Emerging Trends in Physics for Environmental Monitoring & Management (ET-

PEMM-12), 17-19, December 2012 Organized by: Department of Physics Punjabi

University-Patiala, PP-28: 77 (2012).

23. “Effect of swift heavy ion irradiation on structural properties of GdFeO3 thin Film”,

Pawanpreet Kaur, K.K.Sharma and Ravi Kumar, AIP Conf. Proc. 1536, (2013) 495.

24. “Effect of Ni doping on structural and dielectric properties of GdFeO3” Pawanpreet

Kaur, K. K. Sharma, Ravi Kumar, Rabia Pandit, International Journal of Modern

Physics: Conference Series Vol. 22 (2013) 179.

25. “Thickness dependent transport studies of YBCO in La0.7Sr0.3MnO3/YBa2Cu3O7-

δ/ La0.7Sr0.3MnO3 heterostructure”. Minaxi Sharma, K.K. Sharma, Ravi Kumar and

R.J. Choudhary, AIP Conference proccedings 1536, 345 (2013).

26. “Magneto-transport study in La1-xCaxMnO3 (x = 0.3) system”, Minaxi Sharma, K.

K. Sharma, Ravi Kumar and Ram Janay Choudhary, International Conference on

Magnetic Materials and Applications (MagMA-2013), December 5th-7th 2013, orga-

nized by Department of Physics, Indian Institute of Technology Guwahati, Assam in

association of magnetic Society of India. .

27. Vinod Kumar, Rajesh Kumar, D K Shukla, S K Arora, I V Shevts and Ravi Kumar, “Magnetic

Properties of LaCoNiO3 (x = 0, 0.2, 0.4), in JCNS Workshop, Trends and Perspectives in Neu-

tron Scattering for Magnetism and Electron Systems’ held in Tutzing, Germany from 7-10

October, 2013.

28. “Magneto-transport and magnetic studies of epitaxial manganite/cuprate/manganite

trilayers”, Minaxi Sharma, K. K. Sharma, Ravi Kumar and R. J. Choudhary, Interna-

tional Conference on Magnetic Materials and Applications (ICMAGMA-2014), Sep-

tember 15th-17th 2014, organized by Department of Physics, Pondicherry University in

association of magnetic society of India.

29. Transport properties of La 0.7Sr0.3MnO3/YBa2Cu3O7-δ  (LSMO/YBCO) heterostructure .

Minaxi Sharma, Arvind Kumar, K. K. Sharma, Ravi Kumar and R. J. Choudhary

AIP Conf. Proc. 1661, 070013 (2015).

30. Growth and properties of La 0.7Sr0.3MnO3/YBa2Cu3O7−δ/La0.7Sr0.3MnO3  epitaxial trilayer

films. Minaxi Sharma, Arvind Kumar, K. K. Sharma, Ravi Kumar and R. J. Choud-

hary. AIP Conf. Proc. 1675, 030026 (2015).

31. Effect of In3+substitution on structural properties, cation distribution, and Mössbauer

spectra of CoFe2O4 ferrite, Ravi Kumar, Rabia Pandit, K. K Sharma and Pawanpreet

Kaur, 58th DAE Solid State Physics Symposium held at Thapar University Patiala

during 17-21st December, 2013, AIP Conf. Proc. 1591, 1560 (2014).

32. “Manganite/High temperature Superconductor/Manganite heterostructures”, Minaxi

Sharma, K. K. Sharma, and Ravi Kumar, Thematic Workshop on Physics of Phase

Transitions, October 24th-25th 2013, organized by UGC-DAE Consortium for Scien-

tific Research, Indore.

33. 100 MeV Ni+7 Swift Heavy Ion Induced magnetism in Cobalt Doped ZnO Thin Films, Sunil Kumar, Ravi Kumar and Davinder Paul Singh, DAE-SSPS- 2013 (Patiala) ‘’ AIP Conference Proceeding, 1591, pp 1566.

34. “ AFM and MFM study of magnetic thin films of GdFeO3 grown by pulsed-laser de-

position”. Pawanpreet Kaur, Rabia Pandit, K.K.Sharma and Ravi Kumar, 19th Na-

tional Conference on Liquid Crystals, November 21-23, 2012, Thapar University, Pa-

tiala and Indian Liquid Crystal Society, Conference proceeding, P-02

35. Structural and magnetic studies of Al3+ doped cobalt ferrites CoFe2−xAlxO4 (x = 0.0,

0.2, 0.4) Rabia Pandit, Pawanpreet Kaur, K. K. Sharma, and Ravi Kumar, Proceed-

ings of 57th DAE Solid State Physics Symposium held during 3-7th December, 2012 at

Indian Institute of Technology-Bombay, Mumbai, India, AIP Conf. Proc. 1512, pp.

1130-1131(2013).