稀土-过渡金属薄膜磁各向异性的理论研究  

Theoretic studies on the magnetic anisotropy of rare-earth transition-metal thin films

作　　者：何一鸣[1] 钱显毅[2] 黄致新[3] 

机构地区：[1]常州工学院延陵学院,江苏常州213002 [2]常州工学院电子信息与电气工程学院,江苏常州213002 [3]华中师范大学物理科学与技术学院,武汉430079

出　　处：《华中师范大学学报（自然科学版）》2011年第4期557-560,共4页Journal of Central China Normal University：Natural Sciences

基　　金：国家自然科学基金项目(60490291)

摘　　要：对稀土-过渡金属薄膜的磁各向异性进行了理论分析研究.通过分析其它模型以及薄膜成膜过程的特点,建立了单离子模型,并进行了理论分析和计算.结果发现:组分为R31Co69薄膜中稀土元素R为Tb时的Ku值最大,接近3.1×106 erg/cm3.对于TbCo非晶垂直磁化膜而言,具有非球对称电荷分布的非S态离子Tb与局部电场的相互作用构成了其垂直磁各向异性的主要部分.The magnetic anisotropy of rare-earth transition-metal thin films is investiga ted in this paper. Based on the reference review and the analysis of thin film forming process by sputtering, the single ion model has been put foreword. With concrete com putation, we found that when the composition of the film is R31 Co69 and the rare earth element is Tb, the magnetic anisotropy value can be as high as 3.1×106 erg/cm^3. And the Coulomb interactions between the non-S state rare-earth ion in non-spherical electric charge distribution with the deformed local crystalline field accounts for the major source of high perpendicular anisotropy of TbCo amorphous films.

关 键 词：稀土-过渡金属 薄膜 磁各向异性 理论分析 

分 类 号：O484[理学—固体物理]