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平面波展开法计算二维磁振子晶体带结构
引用本文:曹永军,云国宏,那日苏.平面波展开法计算二维磁振子晶体带结构[J].物理学报,2011,60(7):77502-077502.
作者姓名:曹永军  云国宏  那日苏
作者单位:(1)内蒙古大学物理科学与技术学院,呼和浩特 010020;内蒙古自治区功能材料物理与化学重点实验室和内蒙古师范大学物理与电子信息学院,呼和浩特 010022; (2)内蒙古自治区功能材料物理与化学重点实验室和内蒙古师范大学物理与电子信息学院,呼和浩特 010022
基金项目:国家自然科学基金(批准号:10947008,50901039,11072104)和内蒙古大学高层次人才引进基金(批准号:Z20090146)资助的课题.
摘    要:磁振子晶体是光子晶体或声子晶体在磁性材料领域内的替代品,是近来的一个研究热点. 本文提出了磁振子晶体领域内的一种平面波展开法,其较传统的平面波展开法能节约一半以上的计算时间. 采用此方法,数值计算了由Fe/EuO二种铁磁材料构成的二维磁振子晶体带结构. 数值计算结果表明,在一定的体积填充率下,有自旋波带隙的出现;影响磁振子晶体带隙结构形成的主要因素是有效场中的交换作用场,其他作用场的影响相对很小. 关键词: 磁振子晶体 带隙 平面波展开法

关 键 词:磁振子晶体  带隙  平面波展开法
收稿时间:2010-09-11

Band-structure calculations of two-dimesional magnonic crystals with plane-wave expansion method*
Cao Yong-Jun,Yun Guo-Hong and Narsu.Band-structure calculations of two-dimesional magnonic crystals with plane-wave expansion method*[J].Acta Physica Sinica,2011,60(7):77502-077502.
Authors:Cao Yong-Jun  Yun Guo-Hong and Narsu
Institution:College of Physical Science and Technology, Inner Mongolia University, Huhhot 010020, China;Inner Mongolia Key Laboratory of Physics and Chemistry of Functional Materials and College of Physics and Electronic Information, Inner Mongolia Normal University,;College of Physical Science and Technology, Inner Mongolia University, Huhhot 010020, China;Inner Mongolia Key Laboratory of Physics and Chemistry of Functional Materials and College of Physics and Electronic Information, Inner Mongolia Normal University,;Inner Mongolia Key Laboratory of Physics and Chemistry of Functional Materials and College of Physics and Electronic Information, Inner Mongolia Normal University, Huhhot 010022, China
Abstract:Recently, magnonic crystals which are the magnetic counterparts of photonic crystals or phononic crystals are growing into a hot area of research. In this paper, a plane-wave expansion method in the field of magnonic crystals is proposed. By using this method, band structures of two-dimensional magnonic crystals composed of ferromagnetic materials Fe and EuO are calculated. The numerical results show that the spin-wave gaps will be generated under a definite filling fraction ratio, and the effect of exchange field on the band structure is larger than that of other field in the effective field.
Keywords:magnonic crystals  band gap  palne-wave expansion method
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