This title appears in the Scientific Report :
2006
Please use the identifier:
http://hdl.handle.net/2128/1442 in citations.
Please use the identifier: http://dx.doi.org/10.1103/PhysRevLett.97.026404 in citations.
Thermal Collapse of Spin Polarization in Half-Metallic Ferromagnets
Thermal Collapse of Spin Polarization in Half-Metallic Ferromagnets
We propose two novel approaches to study the temperature dependence of the magnetization and the spin polarization at the Fermi level in magnetic compounds, and apply them to half-metallic ferromagnets. We reveal a new mechanism, where the hybridization of states forming the half-metallic gap depend...
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Personal Name(s): | Lezaic, M. |
---|---|
Mavropoulos, Ph. / Enkovaara, J. / Bihlmayer, G. / Blügel, S. | |
Contributing Institute: |
Theorie I; IFF-TH-I Jülich-Aachen Research Alliance - Simulation Sciences; JARA-SIM JARA-FIT; JARA-FIT |
Published in: | Physical review letters, 97 (2006) |
Imprint: |
College Park, Md.
APS
2006
|
DOI: |
10.1103/PhysRevLett.97.026404 |
Document Type: |
Journal Article |
Research Program: |
Grundlagen für zukünftige Informationstechnologien |
Series Title: |
Physical Review Letters
97 |
Subject (ZB): | |
Link: |
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Publikationsportal JuSER |
Please use the identifier: http://dx.doi.org/10.1103/PhysRevLett.97.026404 in citations.
We propose two novel approaches to study the temperature dependence of the magnetization and the spin polarization at the Fermi level in magnetic compounds, and apply them to half-metallic ferromagnets. We reveal a new mechanism, where the hybridization of states forming the half-metallic gap depends on thermal spin fluctuations and the polarization can drop abruptly at temperatures much lower than the Curie point. We verify this for NiMnSb by ab initio calculations. The thermal properties are studied by mapping ab initio results to an extended Heisenberg model which includes longitudinal fluctuations and is solved by a Monte Carlo method. |