二维二组元磁振子晶体薄板带结构的计算  

Calculations of the Band-structure of Two-dimensional Two-component Magnonic Crystals Thin Film

作　　者：黄瑛[1] 刘文静[1] 曹永军[1] 

机构地区：[1]内蒙古师范大学物理与电子信息学院,内蒙古呼和浩特010022

出　　处：《河北师范大学学报（自然科学版）》2015年第3期216-220,共5页Journal of Hebei Normal University：Natural Science

基　　金：国家自然科学基金(11264028);内蒙古自治区自然科学基金(2012MS0114)

摘　　要：采用平面波展开法,数值计算了由钴(Co)方柱正方排列于坡莫合金(Py)中构成的二维二组元磁振子晶体薄板的自旋波能带结构,其中外加磁场方向平行于薄板平面.计算结果表明,自旋波的传播强烈依赖于外加磁场的方向,可分为向后体静磁体波和类Damon-Eshbach波2种情况.在所考虑的磁振子晶体薄板结构中没有完全带隙产生,但沿外磁场方向传播的向后体波有部分带隙打开.By using the plane-wave expansion method, the band structure of the two-dimensional two component magnonic crystal thin film,Co square rods embedded squarely in a Py thin film,are numerically calculated, in which, the magnetic field is added along the film plane. The results show that the propagating of spin waves is strongly dependent on the direction of the added magnetic field,and the waves can he di- vide into back volume magnetostatic mode and DE-like mode,respectively. There is no full gap in the band structure of the magnonic crystals film,but the partial gaps of the back volume mode can be found.

关 键 词：磁振子晶体薄板 带结构 平面波展开法 

分 类 号：O417.1[理学—理论物理]