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@ARTICLE{Inosov:906324,
author = {Inosov, D. S. and Avdoshenko, S. and Portnichenko, P. Y.
and Choi, Eun Sang and Schneidewind, A. and Mignot, J.-M.
and Nikolo, M.},
title = {{L}ocal origin of the strong field-space anisotropy in the
magnetic phase diagrams of {C}e 1 − x {L}a x {B} 6
measured in a rotating magnetic field},
journal = {Physical review / B},
volume = {103},
number = {21},
issn = {1098-0121},
address = {Woodbury, NY},
publisher = {Inst.},
reportid = {FZJ-2022-01374},
pages = {214415},
year = {2021},
abstract = {Cubic f-electron compounds commonly exhibit highly
anisotropic magnetic phase diagrams consisting of multiple
long-range ordered phases. Field-driven metamagnetic
transitions between them may depend not only on the
magnitude, but also on the direction of the applied magnetic
field. Examples of such behavior are plentiful among
rare-earth borides, such as RB6 or RB12 (R = rare earth). In
this work, for example, we use torque magnetometry to
measure anisotropic field-angular phase diagrams of La-doped
cerium hexaborides, Ce1−xLaxB6 (x=0,0.18,0.28,0.5). One
expects that field-directional anisotropy of phase
transitions must be impossible to understand without knowing
the magnetic structures of the corresponding competing
phases and being able to evaluate their precise
thermodynamic energy balance. However, this task is usually
beyond the reach of available theoretical approaches,
because the ordered phases can be noncollinear, possess
large magnetic unit cells, involve higher-order multipoles
of 4f ions rather than simple dipoles, or just lack
sufficient microscopic characterization. Here we demonstrate
that the anisotropy under field rotation can be
qualitatively understood on a much more basic level of
theory, just by considering the crystal-electric-field
scheme of a pair of rare-earth ions in the lattice, coupled
by a single nearest-neighbor exchange interaction.
Transitions between different crystal-field ground states,
calculated using this minimal model for the parent compound
CeB6, possess field-directional anisotropy that strikingly
resembles the experimental phase diagrams. This implies that
the anisotropy of phase transitions is of local origin and
is easier to describe than the ordered phases themselves.},
cin = {JCNS-FRM-II / MLZ / JCNS-2 / JCNS-4},
ddc = {530},
cid = {I:(DE-Juel1)JCNS-FRM-II-20110218 / I:(DE-588b)4597118-3 /
I:(DE-Juel1)JCNS-2-20110106 / I:(DE-Juel1)JCNS-4-20201012},
pnm = {632 - Materials – Quantum, Complex and Functional
Materials (POF4-632) / 6G4 - Jülich Centre for Neutron
Research (JCNS) (FZJ) (POF4-6G4)},
pid = {G:(DE-HGF)POF4-632 / G:(DE-HGF)POF4-6G4},
experiment = {EXP:(DE-MLZ)PANDA-20140101},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000661189400002},
doi = {10.1103/PhysRevB.103.214415},
url = {https://juser.fz-juelich.de/record/906324},
}