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@ARTICLE{Paul:201058,
author = {Paul, Amitesh and Schmidt, C. and Paul, N. and Ehresmann,
A. and Mattauch, Stefan and Böni, Peter},
title = {{S}ymmetric magnetization reversal in polycrystalline
exchange coupled systems via simultaneous processes of
coherent rotation and domain nucleation},
journal = {Physical review / B},
volume = {86},
number = {9},
issn = {1098-0121},
address = {College Park, Md.},
publisher = {APS},
reportid = {FZJ-2015-03368},
pages = {094420},
year = {2012},
abstract = {Training in exchange bias systems plays an essential role
in understanding the very origin of the biasing effect. The
nonequilibrium arrangement of antiferromagnetic (AF) spins
at the antiferromagnetic-ferromagnetic interface, related to
the AF uniaxial anisotropy, plays a crucial role during the
initial training. Our system of choice, IrMn/CoFe, possesses
softer uniaxial anisotropy compared to other AF systems
(e.g., CoO), thereby reducing the energy penalty due to
nonequilibrium spins. Different methods have been applied to
initialize or modify the unidirectional anisotropy. We apply
an in-plane field (a) during field growth, (b) during field
cooling below its blocking temperature, and (c) in an
in-plane magnetic field during ion irradiation, along and
opposite the field applied during field growth.
Magnetization reversal mechanisms were investigated during
the first two field cycles to identify the role of each
method on the training. A detailed analysis of polarized
neutron scattering using the distorted wave Born
approximation reveals a simultaneous process of domain
nucleation and coherent rotation for magnetization
reversal.},
cin = {JCNS (München) ; Jülich Centre for Neutron Science JCNS
(München) ; JCNS-FRM-II / Neutronenstreuung ; JCNS-1 /
IKP-1},
ddc = {530},
cid = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
I:(DE-Juel1)JCNS-1-20110106 / I:(DE-Juel1)IKP-1-20111104},
pnm = {451 - Soft Matter Composites (POF2-451) / 54G - JCNS
(POF2-54G24)},
pid = {G:(DE-HGF)POF2-451 / G:(DE-HGF)POF2-54G24},
experiment = {EXP:(DE-MLZ)TREFF-20140101},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000308736400003},
doi = {10.1103/PhysRevB.86.094420},
url = {https://juser.fz-juelich.de/record/201058},
}