Curie temperatures and exchange interactions in diluted group-IV magnetic semiconductors

被引：1
|
作者：
Kudrnovsky, J
Turek, I
Drchal, V
Bruno, P
机构：
[1] Inst Phys AS CR, CZ-18221 Prague, Czech Republic
[2] Inst Phys Mat AS CR, CZ-61662 Brno, Czech Republic
[3] Charles Univ, Dept Elect Struct, CZ-12116 Prague, Czech Republic
[4] Max Planck Inst Mikrostrukturphys, D-06120 Halle Saale, Germany
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2004年 / 272卷
关键词：
magnetic semiconductors; Curie temperature; exchange interactions; first principles;
D O I：
10.1016/j.jmmm.2003.12.789
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Effective exchange interactions between magnetic atoms in GeMnCr alloys are obtained from the first principles by mapping total energies associated with rotations of magnetic moments onto the effective classical Heisenberg Hamiltonian. The calculated Curie temperature increases with Mn concentration but decreases linearly with increasing Cr content in a good agreement with a recent experiment. (C) 2003 Published by Elsevier B.V.
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页码：1995 / 1996
页数：2
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