铁磁/反铁磁双层薄膜中自旋波禁闭现象研究  

CONFINED PHENOMENON OF SPIN WAVES IN FERROMANGNETIC/ANTIFERROMAGNETIC BILAYERS

作　　者：王焕[1] 荣建红[2] 

机构地区：[1]内蒙古农业大学理学院,呼和浩特010018 [2]内蒙古大学物理科学与技术学院,呼和浩特010021

出　　处：《低温物理学报》2015年第1期60-64,共5页Low Temperature Physical Letters

基　　金：内蒙古自治区高等学校科学技术研究(批准号:NJZY13072);内蒙古自然科学基金项目(批准号:2012MS0110)资助的课题

摘　　要：本文在一维海森堡模型的基础上,采用界面参数化方法,研究了非周期性边界条件下,铁磁/反铁磁双层薄膜中自旋波低温激发问题.发现体系中除了存在体自旋波外还存在禁闭自旋波.此类自旋波只能在一个子层中传播,在另一子层中没有激发.而且,禁闭在反铁磁层中自旋波的能量低于体自旋波的能量;禁闭在铁磁层中自旋波的能量高于体自旋波的能量.Based on the one-dimension Heisenberg model, the spin waves excitation with low temperature in ferro- magnetic/antiferromagnetic films under no-periodicity boundary condition are discussed using the interface-rescaling approach. Not only body but also confined spin waves are excited in system. This spin waves only propagated in one film, no excitated in another film. The spin waves energy confined in antiferromagnetie were lower than body spin waves. On the contrary, The spin waves energy confined in ferromagnetic were higher than body spin waves.

关 键 词：铁磁-反铁磁薄膜 自旋波 界面参数化方法 

分 类 号：O484[理学—固体物理]