Collective Motion of Spins in Ferro- and Antiferromagnets+
Collective Motion of Spins in Ferro- and Antiferromagnets+
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铁磁体和反铁磁体中自旋的集体运动
DOI：
10.1143/jpsj.17.1384
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发表时间：
1962
影响因子：
1.7
通讯作者：
M. Tachiki
中科院分区：
文献类型：
--
作者：
J. Kanamori;M. Tachiki
+ 目前工作的简要说明发表在京都国际磁学和晶体学会议的会议记录中，由日本物理学会出版，1962 年。提出了一种计算有序自旋态中自旋波频率的温度依赖性的新方法。铁磁体的结果与 Keffer 的表达一致。还计算了存在各向异性能量时反铁磁体中的自旋波频率。通过本方法，表明反铁磁共振频率可以在现象学上用各向异性常数和静态磁化率来表达。所获得的共振频率的表达式在任何统计近似中都是有效的。利用该结果讨论了观察到的MnF 2 中谐振频率的温度依赖性。
+ A brief account of the present work is published in the proceedings of the International Conference on Magnetism and Crystallography in Kyoto, published by the Physical Society of Japan, 1962. A new approach to the calculation of the temperature dependence of spin wave frequencies in ordered spin state is proposed. The results for ferromagnets agrees with Keffer's expression. Spin wave frequencies in antiferromagnets in the presence of an anisotropy energy are also calculated. By the present approach it is shown that the antiferromagnetic resonance frequency can be expressed phenomenologically in terms of anisotropy constants and static susceptibilities. The obtained expression of the resonance frequency is valid in any statistical approximation. The observed temperature dependence of the resonance frequency in MnF 2 is discussed by use of this result.