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@ARTICLE{Vrtnik:858862,
author = {Vrtnik, S. and Lužnik, J. and Koželj, P. and Jelen, A.
and Luzar, J. and Krnel, M. and Jagličić, Z. and Meden, A.
and Feuerbacher, M. and Dolinšek, J.},
title = {{M}agnetic phase diagram and magnetoresistance of
{G}d–{T}b–{D}y–{H}o–{L}u hexagonal high-entropy
alloy},
journal = {Intermetallics},
volume = {105},
issn = {0966-9795},
address = {Amsterdam [u.a.]},
publisher = {Elsevier Science},
reportid = {FZJ-2018-07698},
pages = {163 - 172},
year = {2019},
abstract = {We present a study of the magnetic phase diagram and the
magnetoresistance of a Gd–Tb–Dy–Ho–Lu "ideal"
hexagonal high-entropy alloy (HEA), composed of the elements
from the heavy half of the rare earth series only. The phase
diagram contains an antiferromagnetic (AFM) state, a
field-induced ferromagnetic (FM) state above the AFM-to-FM
spin-flop transition and a low-temperature spin-glass state.
The complex phase diagram is a result of competition between
the periodic potential arising from the electronic band
structure that favors periodic magnetic ordering, the
substitutional-disorder-induced random local potential that
favors spin-glass-type spin freezing in random directions,
the Zeeman interaction with the external magnetic field that
favors spin alignment along the field direction and the
thermal agitation that opposes any spin ordering. The
magnetoresistance reflects complexity of the phase diagram.
Its temperature dependence can be explained by a continuous
weakening and final disappearance of the periodic potential
upon cooling that leads to the destruction of long-range
ordered periodic magnetic structures. The magnetoresistance
is large only at temperatures, where the AFM and
field-induced FM structures are present and exhibits a
maximum at the critical field of the AFM-to-FM transition.
Within the AFM phase, the magnetoresistance is positive with
a quadratic field dependence, whereas it is negative with a
logarithmic-like field dependence within the field-induced
FM phase. At lower temperatures, the long-range periodic
spin order "melts" and the magnetoresistance diminishes
until it totally vanishes within the low-temperature spin
glass phase. The magnetoresistance is asymmetric with
respect to the field sweep direction, reflecting
nonergodicity and frustration of the spin system.},
cin = {PGI-5},
ddc = {670},
cid = {I:(DE-Juel1)PGI-5-20110106},
pnm = {143 - Controlling Configuration-Based Phenomena (POF3-143)},
pid = {G:(DE-HGF)POF3-143},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000456760300021},
doi = {10.1016/j.intermet.2018.10.014},
url = {https://juser.fz-juelich.de/record/858862},
}