旋转方柱散射体对二维磁振子晶体薄板带结构的影响

摘要

Using the plane-wave expansion method,band structures of two-dimensional magnonic crys-tal thin film composed of Fe square rods embedded squarely in a Ni thin film are numerically calculated,in which the effects of rotating square scatterers on the gaps are studied.The results show that it is effective to open band gaps and to produce high frequency band gaps by rotating the square rods,at the same time, the center frequency of band gap can be changed.That is to say,the control of the band gap structure in magnonic crystal thin film can be realized.%利用平面波展开法，对铁(Fe)方柱正方排列在镍(Ni)基底中构成的薄板状二维磁振子晶体的带结构进行了数值计算，研究了旋转方柱散射体对薄板状二维磁振子晶体带隙结构的影响。结果显示，旋转方柱散射体可以有效地打开自旋波带隙并得到高频带隙，同时还能改变带隙中心频率的位置，从而实现对薄板状磁振子晶体带隙结构的调控作用。