Survey of Ferromagnetic Resonance in Small Ferrimagnetic Ellipsoids
Survey of Ferromagnetic Resonance in Small Ferrimagnetic Ellipsoids
复制标题
小型亚铁磁椭球体中铁磁共振的调查
DOI：
10.1063/1.1984617
复制
发表时间：
1960
影响因子：
3.2
通讯作者：
F. Morgenthaler
中科院分区：
文献类型：
--
作者：
F. Morgenthaler
本文讨论了当存在典型自旋波时，在任意方向磁化并由空间均匀微波磁场激发的小型亚铁磁椭球体中的磁化响应。给出了广义基特尔频率，并讨论了适合椭球几何的可能频率生成过程。如果椭球体以与主轴成一定角度的方式磁化，则基频退磁场的时变分量会出现在纵向方向上，并且会出现在此频率下变化的横向分量。之前的分析并未包含这种可能性，因此错过了某些有趣的解决方案。特别地，发现当驱动场超过特定阈值功率时可能产生分谐波以及谐波。考虑了半频谐振的特殊情况，并给出了最小阈值的条件。广义 Suhl 自旋波谱...
This paper discusses the response of the magnetization in a small ferrimagnetic ellipsoid, magnetized in an arbitrary direction and excited by spatially uniform microwave magnetic fields, when a typical spin wave is present. The generalized Kittel frequency is given, and possible frequency generation processes appropriate to the ellipsoidal geometry are treated. If the ellipsoid is magnetized at an angle to a principal axis, time-varying components of demagnetizing field at the fundamental frequency occur in the longitudinal direction, as well as transverse components varying at this frequency. Previous analyses have not included such a possibility and certain interesting solutions have, therefore, been missed. In particular, it is found that subharmonics as well as harmonics may be created when the driving field exceeds a certain threshold power. The particular case of the half-frequency resonance is considered and the conditions for the minimum threshold are given. The generalized Suhl spin-wave spectru...