The Effect of Gd Impurities on the Physical Properties of Half-Metallic Ferromagnet Co_2MnSi

• Authors: R. Grasin , E. Vinteler , A. Bezergheanu , C. Rusu , R. Pacurariu , I. Deac , R. Tetean
• Languages of publication: EN

Abstracts

EN

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.

Keywords

EN

71.70.Ej   71.55.Ak   73.20.Hb  

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2010
• Volume: 118
• Issue: 4
• Pages: 648-651

Dates

published

2010-10

received

2010-01-26

(unknown)

2010-08-04

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Identifiers

DOI

10.12693/APhysPolA.118.648