The spin waves in the double exchange interaction systems

被引：1
|
作者：
Hu, CD [1 ]
机构：
[1] Natl Taiwan Univ, Dept Phys, Taipei, Taiwan
来源：
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2000年 / 69卷 / 07期
关键词：
colossal magnetoresistance; mangnites; double exchange;
D O I：
10.1143/JPSJ.69.2261
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We performed a detailed study of the double exchange interaction. Having rearranged Kubo and Ohata's Hamiltonian [J. Phys. Sec. Jpn. 33 (1972) 21], we found that it can be treated perturbatively for the temperature lower than T-C. The spin wave propagator was calculated and the spin stiffness was computed. It agrees reasonablly well with experimental results. We believe that the double exchange interaction is the fundamental mechanism in the perovskite manganites.
引用
收藏
页码：2261 / 2268
页数：8
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