磁性薄膜的次表面自旋波分布及影响因素分析  

Analysis of subsurface spin wave distribution and its influencing factors in magnetic films

作　　者：邱荣科[1] 吴伟 刘忠菊[1] QIU Rong-ke;WU Wei;LIU Zhong-ju(School of Science,Shenyang University of Technology,Shenyang 110870,China)

机构地区：[1]沈阳工业大学理学院,沈阳110870

出　　处：《沈阳工业大学学报》2023年第1期31-35,共5页Journal of Shenyang University of Technology

基　　金：辽宁省自然科学基金项目(2019-ZD-0199)。

摘　　要：为了了解铁磁性薄膜中局域自旋波的性质,基于海森堡模型利用量子格林函数方法对铁磁性薄膜的自旋波分布进行了研究,分析了外部物理因素(温度和外磁场)和薄膜表面性质(表面各向异性和表面交换耦合)对表面布里渊区内次表面自旋波存在区域的影响,并比较了表面与次表面自旋波性质的差异.结果表明:温度和外磁场对次表面自旋波存在区域的影响规律相似,而表面各向异性和表面交换耦合对次表面自旋波存在区域的影响规律相似;次表面自旋波的存在区域始终小于表面自旋波的存在区域.In order to understand the properties of local spin waves in magnetic films,the spin wave distribution of ferromagnetic films was studied by quantum Green’s function method and Heisenberg model.The effects of external physical factors(temperature and external magnetic field)and film surface properties(surface anisotropy and surface exchange coupling)on the existence regions of subsurface spin waves in the surface Brillouin zone were analysed,and the differences between surface and subsurface spin wave properties were compared.The results show that the temperature and the external magnetic field have similar influence on the subsurface spin wave,and the surface anisotropy and the surface exchange coupling have identical effect as well.The existence regions of subsurface spin wave are always smaller than those of surface spin wave.

关 键 词：海森堡模型 量子格林函数 铁磁性薄膜 自旋波分布 次表面自旋波 临界波矢 表面各向异性 表面交换耦合 

分 类 号：TG111.92[金属学及工艺—物理冶金]