软硬磁界面应变造成的畴壁钉扎  

Domain Wall Pinning Caused by Strain at the Interface of Soft and Hard Magnetic Media

作　　者：郭子政[1,2] 

机构地区：[1]内蒙古自治区功能材料物理与化学重点实验室内蒙古师范大学物理与电子信息学院 [2]内蒙古师范大学功能材料设计与计算研究中心,内蒙古呼和浩特010022

出　　处：《磁性材料及器件》2010年第5期12-14,23,共4页Journal of Magnetic Materials and Devices

基　　金：国家自然科学基金资助项目(10765003)

摘　　要：基于平衡时总能量极小的条件,通过近似求解畴壁的欧拉方程,研究了软硬磁界面应变造成的180°畴壁钉扎的可能性以及畴壁在两种材料中的分布情况。解析推导出畴壁在两种材料中分布的近似表达式并数值研究了各种参数改变对此分布的影响。结果表明,在多数情况下畴壁将主要分布在界面处软磁区域一边。衬底材料对畴壁在界面的分布有很大影响。By approximately solving the Euler equation of the domain wall based on minimum total energy under the equilibrium conditions, we studied the pinning possibility and the distribution of the 180° domain wall caused by strain at the soft and hard magnetic interface. Analytic expressions for the domain wall distribution in the two materials were obtained and the effects of some physical parameters on the distributions were analyzed numerically. The results showed that in most cases, domain walls mainly distribute in the soft regional side of the interface. Substrate materials have a significant impact on the interfacial domain wall distribution.

关 键 词：软硬磁界面 应变 畴壁钉扎 

分 类 号：Q482.51[生物学—生理学]