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@ARTICLE{Leai:14822,
author = {Ležaić, Marjana and Mavropoulos, Ph. and Blügel, S. and
Ebert, Hubert},
title = {{C}omplex magnetic behavior and high spin polarization in
{F}e$_{3-x}${M}n$_{x}${S}i alloys},
journal = {Physical review / B},
volume = {83},
number = {9},
issn = {1098-0121},
address = {College Park, Md.},
publisher = {APS},
reportid = {FZJ-2014-03436},
pages = {094434},
year = {2011},
note = {We would like to thank the Supercomputing Center of the
Forschungszentrum Julich (JSC) for providing computational
time. This work was funded in part by the Young
Investigators Group Programme of the Helmholtz Association
"Computational Nanoferronics Laboratory," Contract No.
VH-NG-409.},
abstract = {Fe3Si is a ferromagnetic material with possible
applications in magnetic tunnel junctions. When doped with
Mn, the material shows a complex magnetic behavior, as
suggested by older experiments. We employed the
Korringa-Kohn-Rostoker Green-function method within
density-functional theory in order to study the alloy
Fe3-xMnxSi, with 0 <= x <= 1. Chemical disorder is described
within the coherent potential approximation. In agreement
with experiment, we find that the Mn atoms align
ferromagnetically to the Fe atoms, and that the
magnetization and Curie temperature drop with increasing Mn
concentration x. The calculated spin polarization P at the
Fermi level varies strongly with x, from P = -0.3 at x = 0
(ordered Fe3Si) through P = 0 at x = 0.28, to P = +1 for x >
0.75; i.e., at high Mn concentrations the system is half
metallic. We discuss the origin of the trends of magnetic
moments, exchange interactions, Curie temperature, and the
spin polarization.},
keywords = {J (WoSType)},
cin = {IAS-1 / JARA-FIT / JARA-SIM / PGI-1},
ddc = {530},
cid = {I:(DE-Juel1)IAS-1-20090406 / $I:(DE-82)080009_20140620$ /
I:(DE-Juel1)VDB1045 / I:(DE-Juel1)PGI-1-20110106},
pnm = {Grundlagen für zukünftige Informationstechnologien
(FUEK412) / 422 - Spin-based and quantum information
(POF2-422)},
pid = {G:(DE-Juel1)FUEK412 / G:(DE-HGF)POF2-422},
shelfmark = {Physics, Condensed Matter},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000288944800006},
doi = {10.1103/PhysRevB.83.094434},
url = {https://juser.fz-juelich.de/record/14822},
}