Effects of spin-wave excitations in half-metallic materials

Finite-temperature magnetic properties of half-metallic materials are investigated on the basis of the first-principles Korringa-Kohn-Rostoker Green's function method. Influences of spin-wave excitations on the electronic structure are examined in the framework of the coherent potential approxi...

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Bibliographic Details
Published in:Physical review. B, Condensed matter and materials physics Condensed matter and materials physics, 2012-06, Vol.85 (22), Article 224437
Main Authors: Long, N. H., Ogura, M., Akai, H.
Format: Article
Language:English
Subjects:
Coherent potential approximation
Condensed matter
Deterioration
Direct current
Electronic structure
Excitation
Magnetic properties
Mathematical analysis
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Summary:Finite-temperature magnetic properties of half-metallic materials are investigated on the basis of the first-principles Korringa-Kohn-Rostoker Green's function method. Influences of spin-wave excitations on the electronic structure are examined in the framework of the coherent potential approximation. The calculations show that the half-metallicity is easily destroyed due to an appearence of low-energy electron excited states in the minority-spin band gap at finite temperature. On the other hand, calculated dc conductivity shows that the 100% spin-polarized conduction occurring in half-metallic materials hardly deteriorates even in such a temperature.
ISSN:1098-0121
1550-235X
DOI:10.1103/PhysRevB.85.224437