对称双层铁磁膜中的界面自旋波  

Interface Spin Waves in Symmetrical Ferromagnetic Bilayered Films

作　　者：周文平[1] 云国宏[1] 梁希侠[1] 

机构地区：[1]内蒙古大学理工学院物理系,呼和浩特010021

出　　处：《内蒙古大学学报（自然科学版）》2007年第2期149-153,共5页Journal of Inner Mongolia University：Natural Science Edition

基　　金：教育部新世纪优秀人才计划资助项目No.206024;高等学校博士学科点专项科研基金项目No.20040126003;内蒙古大学青年科学基金项目ND0401资助

摘　　要：运用改进的界面重参数方法,讨论了周期边界条件下对称双层铁磁膜中自旋波本征激发问题,系统中可以存在两种本征模体模和界面模,并给出系统的色散关系和布里渊能带的精细结构.在此基础上重点分析了界面模的存在条件,并发现界面模的存在仅取决于界面耦合作用,与横向自旋波无关.The eigenproblems of spin waves in a symmetrical ferromagnetic bilayered system with periodic boundary conditions are solved by using the improved interface-rescaling approach, and in the system there may be two types of spin waves which are the bulk mode and the interface mode. The dispersion relation and the fine structure of Brillouin zone energy band of the system are given. Conditions for the existence of the interface mode are especially discussed. The result shows that conditions for the existence of the interface mode do not relate to the transversal spin waves, but only depend on the interface coupling.

关 键 词：磁性多层膜 自旋波 改进的界面重参数方法 布里渊区能带 

分 类 号：O484.43[理学—固体物理]