磁性薄膜自旋重取向的机制  

Mechanism of spin reorientation of magnetic thin films

作　　者：任世伟[1] 姚爱巧[2] 李世强[1] 孙敬伟[1] 刘天山[1] 

机构地区：[1]河北科技大学理学院,石家庄050018 [2]燕山大学继续教育学院,河北秦皇岛066004

出　　处：《哈尔滨工业大学学报》2009年第11期232-234,共3页Journal of Harbin Institute of Technology

基　　金：国家自然科学基金资助项目(10274018);河北省科技攻关计划资助项目(506046)

摘　　要：采用Monte Carlo方法,使用微观电子自旋模型和具有偶极相互作用的Heisenberg模型,对16×16二维平方格子的磁性系统自旋重取向现象进行了研究.发现在一定参数下,系统呈现出包含4个不同区域的磁化曲线.从理论上再现了系统从垂直磁化向面内磁化转变时的宏观磁矩的丢失现象,得到了与实验观测相一致的结果.通过计算系统的自旋组态和能量特征,对产生这种现象的机制进行了分析.To explain the spin reorientation of magnetic thin films, a thin film composed of a 16 x 16 two-dimensional square lattice was studied by using the Heisenberg model with long-range dipolar interaction and the Monte Carlo simulation method. It is found that the magnetization curve consists of four regions when parame- ters are in a certain range. The loss of magnetization discovered in experiment is reproduced theoretically when the system changes from an out-of plane to an in-plane ordered state. These results are consistent with the ex- periments. Through the calculation of spin configurations and energy of the system, the mechanisms Of this phenomenon are analyzed.

关 键 词：自旋重取向 磁性薄膜 MONTECARLO模拟 

分 类 号：TQ581[化学工程—精细化工]