research interests structure of matter ...phd.fisica.unimi.it/assets/lascialfari.pdftemperature :...

12
Alessandro Lascialfari, responsible Francesco Orsini, technician, PhD Paolo Arosio, post-doc Elena Garlatti, PhD student Fatemeh Adelnia, PhD student NMR/AFM group NMR/AFM group NMR/AFM group NMR/AFM group RESEARCH INTERESTS STRUCTURE OF MATTER (FUNDAMENTAL PROBLEMS) - molecular nanomagnets and magnetic nanoparticles - Superconducting flucutations in high-Tc and conventional superconductors APPLIED PHYSICS - Magnetic Properties and Morpho-Dimensional characterization of magnetic nanostructures for biomedical applications - biological membranes, membrane proteins and lipid rafts (also Cristina Lenardi)

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Page 1: RESEARCH INTERESTS STRUCTURE OF MATTER ...phd.fisica.unimi.it/assets/Lascialfari.pdfTemperature : 150 < T < 300 K. Muon Spin Rotation ⇒ International facilities PSI-Switzerland and

Ale

ssa

nd

ro L

asc

ialf

ari

, re

spo

nsi

ble

Fra

nce

sco

Ors

ini,

tec

hn

icia

n,

Ph

D

Pa

olo

Aro

sio,

po

st-d

oc

Ele

na

Ga

rla

tti,

Ph

Dst

ud

ent

Fa

tem

ehA

del

nia

, P

hD

stu

den

t

NM

R/A

FM

g

rou

pN

MR

/AF

M g

rou

pN

MR

/AF

M g

rou

pN

MR

/AF

M g

rou

p

RE

SE

AR

CH

IN

TE

RE

ST

S

ST

RU

CT

UR

E O

F M

AT

TE

R (

FU

ND

AM

EN

TA

L P

RO

BL

EM

S)

-m

ole

cula

r n

ano

mag

net

san

d m

agn

etic

nan

op

arti

cles

-S

up

erco

nd

uct

ing

flu

cuta

tions

in h

igh

-Tc

and

co

nv

enti

on

al s

up

erco

nd

uct

ors

AP

PL

IED

PH

YS

ICS

-M

agn

etic

Pro

per

ties

an

d M

orp

ho

-Dim

ensi

on

al c

har

acte

riza

tio

n o

f m

agn

etic

nan

ost

ruct

ure

s fo

r b

iom

edic

al a

pp

lica

tio

ns

-b

iolo

gic

al m

emb

ran

es,

mem

bra

ne

pro

tein

s an

d l

ipid

raf

ts (

also

Cri

stin

a L

ena

rdi)

Page 2: RESEARCH INTERESTS STRUCTURE OF MATTER ...phd.fisica.unimi.it/assets/Lascialfari.pdfTemperature : 150 < T < 300 K. Muon Spin Rotation ⇒ International facilities PSI-Switzerland and

2

Ato

mic

Fo

rce

Mic

rosc

op

yte

chn

iqu

e(n

ext,

F.

Ors

ini)

Ato

mic

Ato

mic

Fo

rce

Fo

rce

Mic

rosc

op

yM

icro

sco

py

tech

niq

ue

tech

niq

ue

(( nex

tn

ext ,

F.

Ors

ini)

, F

. O

rsin

i)

Mu

ltim

od

e -

Nan

osc

op

e3

d A

FM

(Vee

co).

Wo

rkin

g t

emp

eratu

re

ran

ge

0-6

0 ° °°°C

.

Liq

uid

cel

l fo

r m

easu

rem

ents

in

solu

tio

n. P

ico

Forc

em

od

ulu

s fo

r

forc

esp

ectr

osc

op

ym

easu

rem

ents

Mu

ltim

od

e -

Nan

osc

op

e3

d A

FM

(Vee

co).

Wo

rkin

g t

emp

eratu

re

ran

ge

0-6

0 ° °°°C

.

Liq

uid

cel

l fo

r m

easu

rem

ents

in

solu

tio

n. P

ico

Forc

em

od

ulu

s fo

r

forc

esp

ectr

osc

op

ym

easu

rem

ents

Au

toP

rob

eC

P R

ese

arc

h A

FM

(Vee

co).

Wo

rkin

g t

emp

eratu

re r

an

ge

0-6

0 ° °°°C

.

Liq

uid

cel

l fo

r m

easu

rem

ents

in

solu

tion

.

Au

toP

rob

eC

P R

ese

arc

h A

FM

(Vee

co).

Wo

rkin

g t

emp

eratu

re r

an

ge

0-6

0 ° °°°C

.

Liq

uid

cel

l fo

r m

easu

rem

ents

in

solu

tion

.

Page 3: RESEARCH INTERESTS STRUCTURE OF MATTER ...phd.fisica.unimi.it/assets/Lascialfari.pdfTemperature : 150 < T < 300 K. Muon Spin Rotation ⇒ International facilities PSI-Switzerland and

3

Nu

clea

rM

agn

etic

Res

on

an

ce(N

MR

) te

chn

iqu

eN

ucl

ear

Nu

clea

rM

agn

etic

Magn

etic

Res

on

an

ceR

eson

an

ce(N

MR

) (N

MR

) te

chn

iqu

ete

chn

iqu

e

Sm

art

race

rre

laxom

eter

10 k

Hz<

f<10 M

Hz

(H=

0.0

00235-0

.235 T

esla

)

Sm

art

race

rre

laxom

eter

10 k

Hz<

f<10 M

Hz

(H=

0.0

00235-0

.235 T

esla

)

Ste

lar

Sp

imast

er5<

f<70 M

Hz

(H=

0.1

175-1

.5 T

esla

Ste

lar

Sp

imast

er5<

f<70 M

Hz

(H=

0.1

175-1

.5 T

esla

Page 4: RESEARCH INTERESTS STRUCTURE OF MATTER ...phd.fisica.unimi.it/assets/Lascialfari.pdfTemperature : 150 < T < 300 K. Muon Spin Rotation ⇒ International facilities PSI-Switzerland and

Molecu

lar

nano

magn

ets

SMM

SM

M

SMM

SM

M : f

inite

num

ber N

of m

agne

tic c

ente

rs[e

.g. C

r(III

), F

e(III

)], S

ingl

e m

olec

ule

beha

viou

r (ve

ry w

eak

inte

rmol

ecul

ar in

tera

ctio

n), A

F or

F in

tera

ctio

n �

Non

mag

netic

S=0

or l

ow-s

pin,

hig

h-sp

ingr

ound

stat

e

Sin

gle

S

ing

le

mo

lecu

lem

ole

cu

leo

fo

f

Cr7

Fe

Cr7

Fe

Slo

wly

Slo

wly

rela

xin

gre

lax

ing

Co

Ph

OM

eC

oP

hO

Me

SCM

SC

M

SCM

SC

M : m

agne

tic c

hain

s with

wea

k in

trm

olec

ular

inte

ract

ions

and

met

allic

/rar

e-ea

rth

ions

alte

rnat

ing

to

radi

cal g

roup

s⇒slo

w re

laxa

tion

of M

(N

AN

OW

IRES

NA

NO

WIR

ESN

AN

OW

IRES

NA

NO

WIR

ESN

AN

OW

IRES

NA

NO

WIR

ESN

AN

OW

IRES

NA

NO

WIR

ES),

frus

trat

ion,

pec

ulia

r mag

netic

pha

ses

SIM

SIM

SIM

SIM

: sin

gle

rare

-ear

th io

ns v

ery

dilu

ted

in th

e la

ttic

e. G

ood

syst

ems f

or st

udy

of q

uant

um

tunn

elin

g of

mag

netiz

atio

n (e

lect

ro-n

ucle

ar c

oupl

ed le

vels)

Cry

stal

stru

ctu

reC

ryst

al

stru

ctu

re

pp-- N

ON

O22.C.C

66FF

44C

NS

SN

CN

SS

N

Page 5: RESEARCH INTERESTS STRUCTURE OF MATTER ...phd.fisica.unimi.it/assets/Lascialfari.pdfTemperature : 150 < T < 300 K. Muon Spin Rotation ⇒ International facilities PSI-Switzerland and

Very

rece

nt s

tudies

SMM

SMM

SMM

SMM

SMM

SMM

SMM

SMM

: :::C

r7Fe

(N

MR,

C

r7Fe

(N

MR,

C

r7Fe

(N

MR,

C

r7Fe

(N

MR,

χ χχχ) ) ) )

– –––he

tero

met

allic

ring

She

tero

met

allic

ring

She

tero

met

allic

ring

She

tero

met

allic

ring

ST TTT=

1/2

=1/2

=1

/2

=1/2

⇒ ⇒⇒⇒d

istr

ibu

tio

n o

f m

ag

net

ic m

om

ent,

d

istr

ibu

tio

n o

f m

ag

net

ic m

om

ent,

corr

ela

tion

fu

nct

ion

corr

ela

tion

fu

nct

ion

Dim

ers (

NM

R,

Dim

ers (

NM

R,

Dim

ers (

NM

R,

Dim

ers (

NM

R, χ χχχ

) )))⇒ ⇒⇒⇒

basi

c ex

cha

ng

e in

tera

ctio

ns

basi

c ex

cha

ng

e in

tera

ctio

ns

Ni1

0 (

NM

R,

Ni1

0 (

NM

R,

Ni1

0 (

NM

R,

Ni1

0 (

NM

R, χ χχχ

)

)

)

)

⇒ ⇒⇒⇒re

so

na

nt

reso

na

nt

ph

on

on

tra

pp

ing

ph

on

on

tra

pp

ing

FeC

u6, C

oCu6

(N

MR,

Fe

Cu6

, CoC

u6 (

NM

R,

FeC

u6, C

oCu6

(N

MR,

Fe

Cu6

, CoC

u6 (

NM

R, χ χχχ

) ) ) ) - ---

S SSS T TTT=1

/2 sy

stem

=1

/2 sy

stem

=1

/2 sy

stem

=1

/2 sy

stem

⇒ ⇒⇒⇒s

ing

les

ing

lem

ole

cu

le

mo

lec

ule

pa

ram

ag

ne

tp

ara

ma

gn

et

Fe4

(MU

SR,

Fe4

(MU

SR,

Fe4

(MU

SR,

Fe4

(MU

SR, χ χχχ

) ) ) ) - ---

high

high

high

high

- ---spi

n sy

stem

Ssp

in sy

stem

Ssp

in sy

stem

Ssp

in sy

stem

ST TTT=

5

=5

=5

=5 ⇒ ⇒⇒⇒

tran

siti

on

s to

hig

her

Str

an

siti

on

s to

hig

her

STT

sta

tes

sta

tes

SCM

SCM

SCM

SCM

SCM

SCM

SCM

SCM

: :::G

dG

dG

dG

dG

dG

dG

dG

d - ---- ---ba

sed

chai

ns (

NM

R)

base

d ch

ains

(N

MR)

ba

sed

chai

ns (

NM

R)

base

d ch

ains

(N

MR)

ba

sed

chai

ns (

NM

R)

base

d ch

ains

(N

MR)

ba

sed

chai

ns (

NM

R)

base

d ch

ains

(N

MR)

⇒ ⇒⇒⇒

pec

uli

ar

ph

ase

tra

nsi

tio

ns

pec

uli

ar

ph

ase

tra

nsi

tio

ns

(Vil

lain

(Vil

lain

’’ s c

on

ject

ure

)s

con

ject

ure

)

Co

or D

yC

o or

Dy

Co

or D

yC

o or

Dy- ---

base

d ch

ains

(N

MR,

MU

SR)

base

d ch

ains

(N

MR,

MU

SR)

base

d ch

ains

(N

MR,

MU

SR)

base

d ch

ains

(N

MR,

MU

SR)

– –––slo

wly

rela

xing

slow

ly re

laxi

ngslo

wly

rela

xing

slow

ly re

laxi

ng⇒ ⇒⇒⇒

two m

ech

an

ism

s o

f re

laxa

tion

, tw

o m

ech

an

ism

s o

f re

laxa

tion

,

size

eff

ects

size

eff

ects

SIM

SIM

SIM

SIM

SIM

SIM

SIM

SIM

: :::LiY

FLi

YFLi

YFLi

YF4 444:

Ho

(MU

SR)

:Ho

(MU

SR)

:Ho

(MU

SR)

:Ho

(MU

SR)

⇒ ⇒⇒⇒sp

in

spin

dy

na

mic

s d

yn

am

ics

an

d

an

d t

un

nel

ing

tun

nel

ing

Page 6: RESEARCH INTERESTS STRUCTURE OF MATTER ...phd.fisica.unimi.it/assets/Lascialfari.pdfTemperature : 150 < T < 300 K. Muon Spin Rotation ⇒ International facilities PSI-Switzerland and

6

High-Tc

and

con

vent

iona

l SC:

Sup

erc

onduc

ting

“fluc

tuation

s”

T

χd

ia

Tc(

0)

Tc(

H)

[ T

heo

ry w

ith

eex

act

solu

tio

n

xac

t so

luti

on

: P

ran

ge

(19

70

), b

ut

no

fie

ld q

uen

chin

g o

f fl

uct

ua

tin

g p

air

s]

H

T >

> T

C

T ≈ ≈≈≈

TC

Md

ia

χ χχχd

ia

∝ ∝∝∝H

1/2

…..

an

d m

agn

etiz

ati

on

cu

rves

Fir

st e

xp

erim

ents

(G

oll

ub,T

ink

ham

et

al.)

in

met

als

evid

ence

th

e

bre

ak

do

wn

of

a

des

crip

tio

n

wh

ich

n

egle

cts

the

effe

ct o

f th

e fi

eld

in

sup

pre

ssin

g t

he

flu

ctu

atin

g p

airs

, b

ut

only

fro

m M

(T)

curv

es.

Su

scep

tib

ilit

y (

alr

ead

y s

ub

tra

cted

of

Pa

uli

ter

m)…

……

..S

F

Page 7: RESEARCH INTERESTS STRUCTURE OF MATTER ...phd.fisica.unimi.it/assets/Lascialfari.pdfTemperature : 150 < T < 300 K. Muon Spin Rotation ⇒ International facilities PSI-Switzerland and

Magn

etic

mu

ltif

un

ctio

nal

nan

op

art

icle

s

Con

trast

Agen

ts f

or

MR

I

Hyp

erth

erm

ia

Dru

g d

eliv

ery

Bio

sen

sors

Magn

etic

Nan

op

art

icle

s in

Th

era

no

stic

s

Po

ssib

leA

pp

lica

tio

ns

Th

era

no

stic

sT

her

an

ost

ics

clin

ical

ap

pli

cati

on

so

f

no

n-s

pec

ific

CA

sC

As:

Bet

ter

ima

ge

con

tra

st

Page 8: RESEARCH INTERESTS STRUCTURE OF MATTER ...phd.fisica.unimi.it/assets/Lascialfari.pdfTemperature : 150 < T < 300 K. Muon Spin Rotation ⇒ International facilities PSI-Switzerland and

So

lid

ma

gn

etic

bio

sen

sors

Ex

per

imen

tal

ap

pro

ach

es

Ex

per

imen

tal

ap

pro

ach

es

2 d

etec

tio

n m

eth

od

s

SQ

UID

ma

gn

eto

met

ry

Op

tim

ized

im

mo

bil

iza

tio

n o

f

bio

mole

cula

r n

an

op

rob

es

Bio

mo

lecu

lar

na

no

pro

bes

dif

fuse

d i

n a

gel

matr

ix

Nu

clea

r M

ag

net

ic R

eso

na

nce

pp

AA

IgG

BS

A

Ab

IgG

-Bio

tin

Str

ep

tavid

in

Fe

2O

3-P

EO

-B

ioti

n

Th

e m

agn

etic

mo

men

t in

crea

ses

Th

e m

agn

etic

mo

men

t in

crea

ses

in p

rese

nce

of γ γγγ-

Fe 2

O3

wit

h r

esp

ect

to t

he

sub

stra

te +

(p

rote

in)

pro

be.

Sp

ecif

ic b

iolo

gic

al

reco

gn

itio

n

Agaro

se

Str

epta

vid

in

Fe 2

O3-c

-PM

A-c

-Bio

tin

A 1

0-1

5%

ch

an

ge

of

the

tran

sver

se

rela

xa

tion

tim

e T

2⇒ ⇒⇒⇒

Sen

siti

vit

y o

f N

MR

Sen

siti

vit

y o

f N

MR

Det

ecti

on

of

pro

be-

an

aly

te i

nte

ract

ion

…C

lust

ers

Page 9: RESEARCH INTERESTS STRUCTURE OF MATTER ...phd.fisica.unimi.it/assets/Lascialfari.pdfTemperature : 150 < T < 300 K. Muon Spin Rotation ⇒ International facilities PSI-Switzerland and

Ver

t d

ista

nce

: 4.1

46

nm

F.O

rsin

i, M

.Santa

cro

ce, P

.Aro

sio

, V

.F.S

acchi. “O

bserv

ing X

enopus laevis

oocyte

pla

sm

a m

em

bra

ne b

y a

tom

ic forc

e m

icro

scopy”

Meth

ods, 51, 106–113 (

2010).

Sca

n a

rea

45

0x

450

nm

2S

can a

rea

200x200 n

m2

F.O

rsin

i, M

.San

tacr

oce

, P

.Aro

sio,

M.C

asta

gn

a, C

.Len

ard

i, G

.Po

lett

i, V

.F.S

acch

i “I

nte

rmit

ten

t co

nta

ct m

ode

AF

M i

nves

tigat

ion o

f nat

ive

pla

sma

mem

bra

ne

of

Xenopus

laevis

oo

cyte

”E

ur.

Bio

ph

ys.

J.

(20

09)

38,

903

–9

10

F.O

rsin

i, M

.San

tacr

oce

, P

.Aro

sio,

M.C

asta

gn

a, C

.Len

ard

i, G

.Po

lett

i, V

.F.S

acch

i “I

nte

rmit

ten

t co

nta

ct m

ode

AF

M i

nves

tigat

ion o

f nat

ive

pla

sma

mem

bra

ne

of

Xenopus

laevis

oo

cyte

”E

ur.

Bio

ph

ys.

J.

(20

09)

38,

903

–9

10

Hig

her

forc

e

Low

er

forc

e

Sca

n a

rea

200x200 n

m2

Ch

ann

els

in t

he

mem

bra

ne

hav

e a

dia

met

er o

f 6

-8 n

m

Sca

n a

rea

80

x5

0 n

m2

AF

M i

mag

ing

of

AQ

P4

pro

tein

s ex

pre

ssed

in X

enopu

s la

evis

oo

cyte

Sca

n a

rea

10

x1

0 µ

m2

Sca

n a

rea

3x3 µ

m2

Sca

n a

rea

100x100 n

m2

Ass

emb

ly o

f in

div

idu

al

bac

teri

orh

odop

sin

mo

lecu

les

in t

he

pu

rple

mem

bra

ne

Ass

emb

ly o

f in

div

idu

al

bac

teri

orh

odop

sin

mo

lecu

les

in t

he

pu

rple

mem

bra

ne

Cyto

pla

smic

pu

rple

mem

bra

ne

surf

ace

Cyto

pla

smic

pu

rple

mem

bra

ne

surf

ace

Page 10: RESEARCH INTERESTS STRUCTURE OF MATTER ...phd.fisica.unimi.it/assets/Lascialfari.pdfTemperature : 150 < T < 300 K. Muon Spin Rotation ⇒ International facilities PSI-Switzerland and

Mem

bra

ne

pat

ches

sh

ow

mic

ro-d

om

ain

s (l

ater

al s

ize:

10

0-7

00 n

m,

hei

gh

t: 1

-2 n

m)

wit

h a

hig

her

roug

hn

ess

Sca

n a

rea:

1.6

x1.6

μm

2;

Hei

gh

t: 2

0 n

mS

can

are

a: 2

00x200 n

m2;

Hei

ght:

3 n

m

Aft

er a

nti

-flo

t-1

tre

atm

ent

the

mic

ro-d

om

ain

surf

ace

incr

ease

s th

us

sugg

esti

ng t

he

pre

sen

ce o

f

Flo

t-1 p

rote

ins.

An

tibo

dy t

reat

men

t

Sca

le b

ar:

1 μ

m;

Z r

ang

e (f

rom

dar

kes

t to

lig

hte

st):

25 n

m

F.

Ors

ini,

A.

Cre

mona,

P.

Aro

sio

, P

.A.

Co

rset

to,

G. M

on

torf

ano,

A. L

asci

alfa

ri,

A.M

. R

izzo

. “A

tom

ic f

orc

e m

icro

scop

y i

mag

ing o

f li

pid

raf

ts o

f

hu

man

bre

ast

cance

r ce

lls”

Bio

ch

imic

a e

t B

iop

hysi

ca

Acta

-Bio

mem

bra

nes,

18

18

, 2

94

3-2

949

(2

012).

P.A

. C

ors

etto

, A

. C

rem

on

a, G

. M

on

torf

ano

, I.

E. Jo

ven

itti

, F

. O

rsin

i, P

. A

rosi

o,

A.M

. R

izzo

. “C

hem

ical

-Ph

ysi

cal

Chan

ges

in C

ell

Mem

bra

ne

Mic

rodo

mai

ns

of

Bre

ast

Can

cer

Cel

ls A

fter

Om

ega-

3 P

UF

A I

nco

rpo

rati

on”

Cell

Bio

ch

em

istr

y a

nd B

iophysi

cs,

64,

45-5

9 (

2012).

F.

Ors

ini,

A.

Cre

mona,

P.

Aro

sio

, P

.A.

Co

rset

to,

G. M

on

torf

ano,

A. L

asci

alfa

ri,

A.M

. R

izzo

. “A

tom

ic f

orc

e m

icro

scop

y i

mag

ing o

f li

pid

raf

ts o

f

hu

man

bre

ast

cance

r ce

lls”

Bio

ch

imic

a e

t B

iop

hysi

ca

Acta

-Bio

mem

bra

nes,

18

18

, 2

94

3-2

949

(2

012).

P.A

. C

ors

etto

, A

. C

rem

on

a, G

. M

on

torf

ano

, I.

E. Jo

ven

itti

, F

. O

rsin

i, P

. A

rosi

o,

A.M

. R

izzo

. “C

hem

ical

-Ph

ysi

cal

Chan

ges

in C

ell

Mem

bra

ne

Mic

rodo

mai

ns

of

Bre

ast

Can

cer

Cel

ls A

fter

Om

ega-

3 P

UF

A I

nco

rpo

rati

on”

Cell

Bio

ch

em

istr

y a

nd B

iophysi

cs,

64,

45-5

9 (

2012).

Page 11: RESEARCH INTERESTS STRUCTURE OF MATTER ...phd.fisica.unimi.it/assets/Lascialfari.pdfTemperature : 150 < T < 300 K. Muon Spin Rotation ⇒ International facilities PSI-Switzerland and

11

Collabor

ato

rs t

o AIRC p

roje

ct “

Mag

neto

som

es:

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note

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FIR

B “

Ret

e In

tegr

ata

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la N

ano

Med

icin

a (R

INA

ME

)”

Fon

dazion

e C

ariplo

“Chem

ical

syn

thes

is a

nd c

har

acte

riza

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of

mag

neto

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smon

ic n

ano-

het

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EU

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AN

OT

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R “

Inte

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ovel

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ater

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arm

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ald

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r. D

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on

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Page 12: RESEARCH INTERESTS STRUCTURE OF MATTER ...phd.fisica.unimi.it/assets/Lascialfari.pdfTemperature : 150 < T < 300 K. Muon Spin Rotation ⇒ International facilities PSI-Switzerland and

Ato

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