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@ARTICLE{Wagner:857926,
author = {Wagner, Julia and Häußler, Wolfgang and Holderer, Olaf
and Bauer, Andreas and Shapiro, Stephen and Böni, Peter},
title = {{I}nfluence of {C}oncentration {F}luctuations on
{R}elaxation {P}rocesses in {S}pin {G}lasses},
journal = {Quantum beam science},
volume = {2},
number = {4},
issn = {2412-382X},
address = {Barcelona},
publisher = {MDPI},
reportid = {FZJ-2018-06880},
pages = {26 -},
year = {2018},
abstract = {Using the unique combination of atomically resolved atom
probe tomography (APT) and volume averaged neutron
(resonance) spin echo (NRSE and NSE) experiments, the
influence of nano-scaled clusters on the spin relaxation in
spin glasses was studied. For this purpose, the phase
transition from the paramagnetic phase to the spin glass
phase in an Fe-Cr spin glass with a composition of Fe 17.8
Cr 82.2 was studied in detail by means of NRSE. The
microstructure was characterised by APT measurements, which
show local concentration fluctuations of Fe and Cr on a
length scale of 2 to 5 nm, which lead (i) to the coexistence
of ferro- and anti-ferromagnetic clusters and (ii) a change
of the magnetic properties of the whole sample, even in the
spin glass phase, where spins are supposed to be randomly
frozen. We show that a generalized spin glass relaxation
function, which was successfully used to describe the phase
transition in diluted spin glasses, can also be used for
fitting the spin dynamics in spin glasses with significant
concentration fluctuations.},
cin = {JCNS-FRM-II / MLZ / Neutronenstreuung ; JCNS-1},
ddc = {530},
cid = {I:(DE-Juel1)JCNS-FRM-II-20110218 / I:(DE-588b)4597118-3 /
I:(DE-Juel1)JCNS-1-20110106},
pnm = {6G15 - FRM II / MLZ (POF3-6G15) / 6G4 - Jülich Centre for
Neutron Research (JCNS) (POF3-623)},
pid = {G:(DE-HGF)POF3-6G15 / G:(DE-HGF)POF3-6G4},
experiment = {EXP:(DE-MLZ)J-NSE-20140101 / EXP:(DE-MLZ)RESEDA-20140101},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000533300900006},
doi = {10.3390/qubs2040026},
url = {https://juser.fz-juelich.de/record/857926},
}