摘要
应用颗粒膜中颗粒自旋波激发和自旋极化激发的色散关系表达式,对Fe-SiO2颗粒膜进行了计算,探讨其色散规律．结果表明:颗粒自旋波激发与温度无关,而自旋极化激发与温度有关,两者的波谱都随波矢增大而增大, 且波矢取分离值,不具有块状晶体自旋波色散关系周期性的变化特征．
According to the dispersion relation of ferromagnetic granular film from spin wave excitation and spin-polarized excitation, taking the Fe-SiO2 granular film as a case, the spin wave excitation spectrum is independent of temperature, but the spin-polarized excitation dispersion spectrum is dependent of; and both increase with the wave vector increasing which is discontinuous. It hasn＇t the periodicity of the spin wave excitation dispersion spectrum of mass crystal.
出处
《西南师范大学学报（自然科学版）》
CAS
CSCD
北大核心
2005年第6期1048-1052,共5页
Journal of Southwest China Normal University(Natural Science Edition)
基金
重庆市科委资助项目(2003-6111)
关键词
铁磁颗粒膜
自旋波激发
自旋极化激发
色散关系
ferromagnetic granular film
spin wave excitation
spin-polarized excitation
dispersion relation
作者简介
文国知（1973-），男，湖北黄冈人，硕士研究生，主要从事理论物理研究．
通讯作者：郑瑞伦，教授．
