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@ARTICLE{Ogura:860520,
author = {Ogura, Masako and Fukushima, Tetsuya and Zeller, Rudolf and
Dederichs, Peter H.},
title = {{S}tructure of the high-entropy alloy {A}l
{C}r{F}e{C}o{N}i: fcc versus bcc},
journal = {Journal of alloys and compounds},
volume = {715},
issn = {0925-8388},
address = {Amsterdam [u.a.]},
publisher = {ScienceDirect},
reportid = {FZJ-2019-01256},
pages = {454 - 459},
year = {2017},
abstract = {The effect of Al on the crystal structures of the
high-entropy alloy AlxCrFeCoNi is discussed using
first-principles electronic structure calculations. When the
atomic configuration is totally random, AlxCrFeCoNi has the
fcc structure. However, the total energy difference between
the fcc and bcc structures decreases as the Al concentration
increases. In the calculations Cr and Fe stabilize the bcc
structure and Ni and Co work as fcc stabilizer in the
alloys, as is observed in experiments. Moreover, the
interactions between Al and transition metal elements are
strongly attractive. As a result, partially disordered
structures such as L12, D03 and B2, where the Al atoms are
ordered and the transition metal atoms are still random, are
more stable than the totally disordered phases. Especially,
the energy gain by the D03 structure is large and this leads
to the transition from fcc to bcc for strongly increased Al
concentration.},
cin = {PGI-2 / IAS-1 / JARA-FIT / JARA-HPC},
ddc = {540},
cid = {I:(DE-Juel1)PGI-2-20110106 / I:(DE-Juel1)IAS-1-20090406 /
$I:(DE-82)080009_20140620$ / $I:(DE-82)080012_20140620$},
pnm = {144 - Controlling Collective States (POF3-144) / Quantum
description of nanoscale processes in materials science
$(jiff02_20120501)$},
pid = {G:(DE-HGF)POF3-144 / $G:(DE-Juel1)jiff02_20120501$},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000402919400058},
doi = {10.1016/j.jallcom.2017.04.318},
url = {https://juser.fz-juelich.de/record/860520},
}