微细矩形磁性薄膜体系中一致转动磁化模式  

The coherent rotation model in micro-rectangle magnetic film system

作　　者：彭子龙[1] 王伟宁[1] 朱涛[1] 韩秀峰[1] 詹文山[1] 

机构地区：[1]中国科学院物理研究所与凝聚态物理中心磁学国家重点实验室,北京100080

出　　处：《物理学报》2003年第11期2901-2905,共5页Acta Physica Sinica

基　　金：国家自然科学基金 (批准号 :5 0 1710 78)资助的课题~~

摘　　要：针对经过刻蚀的微细矩形磁性体系 ,将样品的形状及其磁晶易磁化轴的偏转两个因素引入经典的Stoner Wohl farth一致转动磁化模型中 ,发现磁性样品的微细化将使其特征星形线发生膨胀 ,而样品形状的缺陷及磁晶易磁化轴的偏转都将导致样品非对称特征星形线的产生 .这些结果说明在诸如磁性随机存储器等基于微细磁性薄膜的工作中 ,薄膜形状及其磁晶易磁化轴的角度不容忽略 .Based on the micro-rectangle magnetic film system, and the shape and the tilt of crystal easy axis introduced into the Stoner-Wohlfarth model, it was found that the expansion of astroid was caused by the size dwindlement of the sample, while the defects in shape and the tilt of crystal easy axis would both result in the formation of asymmetrical astroid. These results illuminated that, in micron order magnetic film systems such as magnetic random access memory, the shape and the tilt of crystal easy axis are important for determining the switch field of the film.

关 键 词：磁性薄膜 磁化模式 Stoner-Wohlfarth模型 各向异性 特征星形线 磁化轴 磁性随机存储器 退磁因子 

分 类 号：O484.43[理学—固体物理] TM27[理学—物理]