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量子自旋波本征值及易轴型各向异性对其的影响

The eigenvalues of quantized spin waves and the effect of the uniaxial anisotropy

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【Author】 Hou Xiao-Juan1)2) Yun Guo-Hong1)3) Bai Yu-Hao1) Bai Narsu3) Zhou Wen-Ping1) 1)(College of Physical Science and Technology,Inner Mongolia University,Hohhot 010021,China) 2)(Department of Applied Physics,School of Mathematics,Physics and Biological Engineering,Inner Mongolia University of Science and Technology,Baotou 014010,China) 3)(Inner Mongolia Key Laboratory of Physics and Chemistry of Functional Materials,College of Physics and Electronic Information,Inner Mongolia Normal University,Hohhot 010022,China)

【机构】内蒙古大学物理科学技术学院；内蒙古科技大学数理与生物工程学院；内蒙古师范大学物理与电子信息学院内蒙古自治区功能材料物理与化学重点实验室；

【摘要】本文考虑体单轴各向异性利用界面重参数化方法从理论上严格推导了两层异质铁磁质中量子自旋波的本征值,并模拟计算了简立方晶格结构(100)第一布里渊区的能带结构,特别研究了易轴型体单轴各向异性对本征值的影响.结果发现在这样的体系中存在体模、禁闭模和界面模;各种本征模与体交换作用、界面交换作用、晶格自旋、原子层数有关,而且各向异性直接影响各种本征模的存在条件.更多还原

【Abstract】 The eigenproblems of quantized spin waves in a(100) ferromagnetic bilayer system have been investigated theoretically by using the interface rescaling approach.The energy-band structure of the system has been obtained and the effect of the uniaxial bulk anisotropy field of easy-axis type on the energy bands were explored thoroughly.It is found that there are bulk modes,perfect confined modes and interface modes in the biferromagnetic system,the existing condition of which is determined not only by the bulk exchange coupling constant,the interface exchange coupling constant,the spin of lattice,the number of atomic layers,but also by the uniaxial bulk anisotropy.更多还原

【关键词】铁磁薄膜；自旋波；各向异性；
【Key words】 ferromagnetic film； spin waves； anisotropy；

【基金】国家自然科学基金(批准号:10762001,11072104和50901039);教育部新世纪优秀人才计划(批准号:NCET-05-0272);高等教育博士基金(批准号:200801260003);内蒙古自然科学基金(批准号:200711020115)资助的课题~~

【文献出处】物理学报 ,Acta Physica Sinica , 编辑部邮箱 ,2011年05期

【分类号】O481
【下载频次】92

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