SPIN-1 EXCHANGE INTERACTION-MODEL OF FERROMAGNETISM

被引：9
|
作者：
CHADDHA, GS
SINGH, J
机构：
[1] Department of Physics, Punjab Agricultural University, Ludhiana
来源：
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS | 1990年 / 161卷 / 02期
关键词：
D O I：
10.1002/pssb.2221610238
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Effects of biquadratic exchange on the low temperature behaviour of magnetisation. Curie temperature, and zero field susceptibility at high temperatures are investigated in the case of a spin-1 Heisenberg ferromagnet. The Green function technique with mixed Callen and RPA decoupling approximations is utilized. Some invalid results and drawbacks of earlier treatments are noted.
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页码：837 / 842
页数：6
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