基于元胞自动机的薄膜磁滞回线的计算机模拟  

The simulation of thin film magnetic hysteresis loop based on cellular automata

作　　者：王昊[1] 廖聪维[1] 吴保磊[1] 叶雪枫[1] 杨晓非[1] 

机构地区：[1]华中科技大学电子科学与技术系,湖北武汉430074

出　　处：《功能材料》2007年第1期26-28,共3页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(60571010)

摘　　要：利用Stoner-Wohlfarth模型,概率型元胞自动机的模型和算法,在考虑了退磁场和交换作用的情况下对薄膜的磁滞回线进行了模拟,比较了温度以及和易轴取向变化时磁化曲线以及剩磁矩形比和矫顽力的不同及变化趋势。退磁场和交换作用的引入对磁化翻转过程有显著的影响,剩磁矩形比和矫顽力都有不同程度的提高。Using the Stoner-Wohlfarth model and stochastic cellular automata and adopting demagnetizing field and exchange interaction,the hysteresis loop of Co thin film has been simulated. The hysteresis loop,remanence squareness and coercivity of the thin film were examined when changing the temperature and the direction of easy axis,respectively. Demagnetizing field and exchange interaction showed a great effect on thin film magnetization reversal process,meanwhile remanence squareness and coercivity change correspondingly.

关 键 词：元胞自动机 Co薄膜 磁滞回线 退磁场 交换作用 

分 类 号：O484.4[理学—固体物理]