This title appears in the Scientific Report :
2011
Please use the identifier:
http://hdl.handle.net/2128/7355 in citations.
Please use the identifier: http://dx.doi.org/10.1063/1.3592168 in citations.
Stability of ferromagnetism against doping in half-metallic alloys
Stability of ferromagnetism against doping in half-metallic alloys
We use a rigid band model to simulate doping in half-metallic NiMnSb and CoMnSb semi-Heusler alloys. Using first-principles calculations we calculate the intrasublattice exchange constants and the Curie temperature for these alloys as a function of the shift of the Fermi level and compare them also...
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Personal Name(s): | Galanakis, I. |
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Sasioglu, E. | |
Contributing Institute: |
Quanten-Theorie der Materialien; IAS-1 Quanten-Theorie der Materialien; PGI-1 |
Published in: | Journal of applied physics, 109 (2011) S. 113912 |
Imprint: |
Melville, NY
American Institute of Physics
2011
|
Physical Description: |
113912 |
DOI: |
10.1063/1.3592168 |
Document Type: |
Journal Article |
Research Program: |
Grundlagen für zukünftige Informationstechnologien |
Series Title: |
Journal of Applied Physics
109 |
Subject (ZB): | |
Link: |
Get full text Published under German "Allianz" Licensing conditions on 2011-06-07. Available in OpenAccess from 2011-06-07 |
Publikationsportal JuSER |
Please use the identifier: http://dx.doi.org/10.1063/1.3592168 in citations.
We use a rigid band model to simulate doping in half-metallic NiMnSb and CoMnSb semi-Heusler alloys. Using first-principles calculations we calculate the intrasublattice exchange constants and the Curie temperature for these alloys as a function of the shift of the Fermi level and compare them also with the case of half-metallic CrAs and CrSe zinc-blende alloys. We show for all four compounds that the interactions between Cr-Cr(Mn-Mn) nearest neighbors are sufficient to explain the behavior of the Curie temperature. The interplay between the ferromagnetic RKKY-like and the antiferromagnetic superexchange interactions depends strongly on the details of the density of states around the minority-spin gap and thus it is found to be alloy-dependent. (C) 2011 American Institute of Physics. [doi:10.1063/1.3592168] |