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@ARTICLE{zdogan:756,
author = {Özdogan, K. and Sasioglu, E. and Galanakis, I.},
title = {{E}ngineering the electronic, magnetic, and gap-related
properties of the quinternary half-metallic {H}eusler
alloys},
journal = {Journal of applied physics},
volume = {103},
issn = {0021-8979},
address = {Melville, NY},
publisher = {American Institute of Physics},
reportid = {PreJuSER-756},
pages = {023503},
year = {2008},
note = {Record converted from VDB: 12.11.2012},
abstract = {We study the electronic and magnetic properties of the
quinternary full Heusler alloys of the type
Co-2[Cr1-xMnx][Al1-ySiy] employing three different
approaches: (i) the coherent potential approximation; (ii)
the virtual crystal approximation; and (iii) supercell
calculations. All three methods give similar results, and
the local environment manifests itself only for small
details of the density of states. All alloys under study are
shown to be half-metals, and their total spin moments follow
the so-called Slater-Pauling behavior of the ideal
half-metallic systems. We especially concentrate on the
properties related to the minority-spin band gap. We present
the possibility to engineer the properties of these alloys
by changing the relative concentrations of the low-valent
transition metal and sp atoms in a continuous way. Our
results show that for realistic applications, compounds rich
in Si and Cr are ideal since they combine large energy gaps
(around 0.6 eV), robust half-metallicity with respect to
defects (the Fermi level is located near the middle of the
gap), and high values of the majority-spin density of states
around the Fermi level, which are needed for large values of
the perfectly spin-polarized current in spintronic devices
like spin valves or magnetic tunnel junctions. (c) 2008
American Institute of Physics.},
keywords = {J (WoSType)},
cin = {IAS-1 / IFF-1},
ddc = {530},
cid = {I:(DE-Juel1)IAS-1-20090406 / I:(DE-Juel1)VDB781},
pnm = {Kondensierte Materie},
pid = {G:(DE-Juel1)FUEK414},
shelfmark = {Physics, Applied},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000252821100015},
doi = {10.1063/1.2831224},
url = {https://juser.fz-juelich.de/record/756},
}