应力场对多层膜Permalloy/Cu/Co/NiO铁磁共振性质影响的理论研究  

Ferromagnetic resonance property of Py/Cu/Co/NiO multilayer structures

作　　者：王东 荣建红[1] 张蕾 王焕[2] 

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]内蒙古农业大学理学院,呼和浩特010018

出　　处：《原子与分子物理学报》2017年第5期926-930,共5页Journal of Atomic and Molecular Physics

基　　金：内蒙古自治区高等学校科学技术研究项目(NJZY16014;NJZY13072);内蒙古自治区自然科学基金(2012MS110)

摘　　要：采用能量极小原理研究了Permalloy(Py)/Cu/Co/Ni O多层膜结构中层间耦合强度和应力各向异性场对薄膜共振频率的影响,得到共振频率随外磁场强度变化关系式.结果发现外应力场强度和方向对系统共振频率的影响在本文中要强于层间耦合强度和交换各向异性场,外应力场方向对光学模共振频率的影响强于声学模,而外应力场强度对声学模共振频率的影响强于光学模.The ferromagnetic resonant （FMR） frequency in Py/Cu/Co/NiO multilayer structures with intensity of interlayer coupling and stress anisotropy has been studied by using the principle of minimal energy. It is found that the FMR frequencies of optical mode and acoustic mode all increase with the increasing external magnetic field. The stress field intensity and direction are more important for FMR frequency of the system than the inter- layer coupling and the exchange anisotropy field. Furthermore, the influence of external stress field direction on the FMR frequencies for the optical mode is stronger than the acoustic mode. On the contrary, the dependence of the FMR frequencies for the acoustic mode on stress field intensity is larger.

关 键 词：铁磁共振 应力各向异性场 层间耦合 

分 类 号：O521[理学—高压高温物理]