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In this paper we report our experimental and theoretical studies on the effect of Gd impurity on the physical properties of the Heusler half-metallic ferromagnet Co_2MnSi. The analysis of the band structures of the doped alloy shows that the half-metallic properties are completely conserved if Gd substitutes Mn atoms. This effect is not determined by the spin-orbit interaction, but through the coupling between the R(4f) spin with the Mn(3d) itinerant electron spins. We evaluate the strength of such a coupling by calculating, in an ab initio fashion, the total energy of Co_{16}GdMn_7Si_8 compound for a parallel and antiparallel f-d coupling. The obtained magnetic moments of Co or Mn sites are in good agreement with the experimental ones.
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Journal
Year
Volume
Issue
Pages
648-651
Physical description
Dates
published
2010-10
received
2010-01-26
(unknown)
2010-08-04
Contributors
author
- Faculty of Physics, Babes-Bolyai University, Kogalniceanu 1, RO-400084, Cluj Napoca, Romania
author
- Faculty of Physics, Babes-Bolyai University, Kogalniceanu 1, RO-400084, Cluj Napoca, Romania
author
- Faculty of Physics, Babes-Bolyai University, Kogalniceanu 1, RO-400084, Cluj Napoca, Romania
author
- Faculty of Physics, Babes-Bolyai University, Kogalniceanu 1, RO-400084, Cluj Napoca, Romania
author
- Faculty of Physics, Babes-Bolyai University, Kogalniceanu 1, RO-400084, Cluj Napoca, Romania
author
- Faculty of Physics, Babes-Bolyai University, Kogalniceanu 1, RO-400084, Cluj Napoca, Romania
author
- Faculty of Physics, Babes-Bolyai University, Kogalniceanu 1, RO-400084, Cluj Napoca, Romania
References
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Publication order reference
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YADDA identifier
bwmeta1.element.bwnjournal-article-appv118n422kz