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

Discipline

• 71.55.Ak: Metals, semimetals, and alloys
• 73.20.Hb: Impurity and defect levels; energy states of adsorbed species
• 71.70.Ej: Spin-orbit coupling, Zeeman and Stark splitting, Jahn-Teller effect

• 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

Contributors

author

R. Grasin

• Faculty of Physics, Babes-Bolyai University, Kogalniceanu 1, RO-400084, Cluj Napoca, Romania

author

E. Vinteler

• Faculty of Physics, Babes-Bolyai University, Kogalniceanu 1, RO-400084, Cluj Napoca, Romania

author

A. Bezergheanu

• Faculty of Physics, Babes-Bolyai University, Kogalniceanu 1, RO-400084, Cluj Napoca, Romania

author

C. Rusu

• Faculty of Physics, Babes-Bolyai University, Kogalniceanu 1, RO-400084, Cluj Napoca, Romania

author

R. Pacurariu

• Faculty of Physics, Babes-Bolyai University, Kogalniceanu 1, RO-400084, Cluj Napoca, Romania

author

I. Deac

• Faculty of Physics, Babes-Bolyai University, Kogalniceanu 1, RO-400084, Cluj Napoca, Romania

author

R. Tetean

• Faculty of Physics, Babes-Bolyai University, Kogalniceanu 1, RO-400084, Cluj Napoca, Romania

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Identifiers

DOI

10.12693/APhysPolA.118.648