磁性多层薄膜中交换各向异性研究  

The study of exchange anisotropy in magnetic trilayers

作　　者：荣建红[1] 云国宏[1,2] 王焕[3] 

机构地区：[1]内蒙古大学物理科学与技术学院,呼和浩特010021 [2]内蒙古师范大学物理与电子信息学院,呼和浩特010022 [3]内蒙古农业大学理学院,呼和浩特010018

出　　处：《原子与分子物理学报》2010年第6期1169-1174,共6页Journal of Atomic and Molecular Physics

基　　金：教育部科学技术研究重点项目(206024);国家自然科学基金(10762001);内蒙古大学高层次引进人才科研启动基金(207057)

摘　　要：采用铁磁共振理论研究了自旋阀体系中交换各向异性场和两铁磁薄膜厚度对体系性质的影响,得到系统色散关系的解析表达式.研究表明:体系中存在的交换各向异性场H_E对声学模和光学模的共振场均有影响(其对声学模的影响较大).而且还发现声学模共振场随A,B层铁磁薄膜厚度的变化关系依赖于系统中交换各项异性场的强弱;相反,光学模共振场随两铁磁层厚度的增加始终增强.The exchange anisotropy and the thickness of two ferromagnetic films are investigated by using ferromagnetic resonance theory. The dispersion relations are derived for this system. It is found that the exchange anisotropy of system has the influence on the resonance field of acoustics and optics modes. On the other hand, the ferromagnetic resonance field of optics modes increases with the increasing thickness of two magnetic films. However, the change of the ferromagnetic resonance field of acoustics modes depended on the intensity of exchange anisotropy.

关 键 词：磁性多层薄膜 交换各向异性 铁磁共振 声学(光学)模 

分 类 号：O482.54[一般工业技术—材料科学与工程]