TY  - JOUR
AU  - Lezaic, M.
AU  - Mavropoulos, Ph.
AU  - Enkovaara, J.
AU  - Bihlmayer, G.
AU  - Blügel, S.
TI  - Thermal Collapse of Spin Polarization in Half-Metallic Ferromagnets
JO  - Physical review letters
VL  - 97
SN  - 0031-9007
CY  - College Park, Md.
PB  - APS
M1  - PreJuSER-52029
PY  - 2006
N1  - Record converted from VDB: 12.11.2012
AB  - 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.
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000239057200048
DO  - DOI:10.1103/PhysRevLett.97.026404
UR  - https://juser.fz-juelich.de/record/52029
ER  -