1. Preparation thin film of REBa2Cu4O8(RE=Y,Yb) by MOD method Shoma AOYAGI Supervisor : Kaname MATSUMOTO Tomoya HORIDE Masahiro YAMANE1

2. Outline my lab back ground experimental conclusion2 3. My Lab (Thin Films of Super-conductor Layer) No PhotoProf. Kaname MATSUMOTONo Photoat soft-ball match We were the champion summer2013!No PhotoAs.Prof. Tomoya HORIDE No PhotoAs.Prof. Masahiro YAMANE Fig.1 MRI by super-conductor 3 http://www.toshiba.co.jp/design/pr/ud/living03.htm 4. Back ground What is Super-conductor ? indicating zero critical resistance below some temperature(Tc) loss of energy is zero Fig.2 electricity cable e-onodera.blog.so-net.ne.jpFor instance, amount lost electricity energy of all Japan..5% France7% http://www.fepc.or.jp/library/words/keiei/shihyou/gainen/1225633_4545.htmlTypical material Y oxide Bi oxide 4 5. Back ground Y oxide (Y-Ba-Cu-O) RE123 RE124(New) About RE124 compared to RE123 increasing Tc by treatments making RE124 phase is difficult Phase graph of Y-Ba-Cu-ORE124RE123 J. Karpinski et al., Solid State Ionics, 101-103 (1997) 985-990Table.1 c-axis length of RE123 and RE124c-axis length()ex-site method Precursor PhaseRE123RE124Y11.68027.252Yb11.65827.299 5 6. Back ground(PLD method) Y2O3(Yb2O3)+0.2MCH3COOH Mix at 60 Ba(CH3COO)2 aqua. plus Mix at 60 10 h firing at 780Cu(CH3COO)2 H2O aqua. plusmixMix at 6010 h firing at 780acidum tartaricum aqua. plusformingGel is made30 h firing at 780 Drying at 80A. Baranauskas et al., Vibrational Spectroscopy, 28 (1997) 2636 7. Back ground(MOD method) Y(diluted by C7H8)Cu(diluted by C7H8) Ba(diluted by C7H8)Mix at room tempertute7 8. Experimantalmaking c-axis oriented single 124How to pruduce coating-pyrolysis process (spin-coating) preannealanneal(RE=Y,Yb)Analyzing XRD -2 scanning find out what is componentaqua substrate spin corterspin 8 9. Y124 precursor anneal effect XRD STOpeakY123peakUnknown peak700 700 1 1h700 24h 700 24 800 1 1h 800 800 24 800 24h9 10. Yb124 precursor anneal effect XRD STOpeakYb124peakY123peakUnknown peak700 1 700 1h700 24h 700 24 800 800 1 1h800 24h 800 24 10 11. Difference by method making precursor (XRD) PLDMODprecursor(PLD) 800 24h (00n)Yb124 seen c=27.214 precursor(MOD) 800 24h (00n)Yb124 seen c=27.254Same XRD pattern11 12. Conclusion I made precursor of Y124 and Yb124 by MOD method. Y124 has not been seen, however Yb124 has been seen. Annealed at 800 for 24hours made Yb124, both of MOD and PLD method. Yb124 by MOD method seems has same quality as one by PLD method.12