铁磁颗粒膜的自旋激发色散关系研究  

Study on the Spin Excitation Dispersion Relation of Ferromagnetic Granular Films

作　　者：文国知[1] 郑瑞伦[1] 

机构地区：[1]西南大学物理学院,重庆400715

出　　处：《西南师范大学学报（自然科学版）》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)

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.

关 键 词：铁磁颗粒膜 自旋波激发 自旋极化激发 色散关系 

分 类 号：O484.41[理学—固体物理]