多层周期薄膜中静磁表面波宽度模色散特性研究

STUDY ON DISPERSIONS OF WIDTH MODE OF MAGNETO STATIC SURFACE WAVE PROPAGATING IN PERIODIC MULTILAYER FILMS

首先建立了有限宽度、具有任意参数的多层薄膜结构中的静磁表面波（ ＭＳＳＷ） 宽度模普适色散方程，这一理论包含了利用多层薄膜控制静磁表面波色散特性的所有情形，使研究更加符合实际．对多周期的［（ＹＩＧ／ＧＧＧ）１０／ 金属层］ 多层膜结构窄样品中ＭＳＳＷ 宽度模色散特性进行了数值计算，ＭＳＳＷ 在多层窄样品中的工作主模为一阶宽度模式，多层膜的周期及参数可以有效地控制ＭＳＳＷ 的色散特性，样品宽度效应也会对色散特性产生影响．

The general dispersion relation of width mode of the magneto\|static surface wave(MSSW) propagating in YIG multilayer films with finite sample width and arbitrary parameters is established. The theory includes all the situations of MSSW dispersion control by multilayer films and is in a better agreement with the actual situation. The dispersion of MSSW width mode in [(YIG/GGG)\-\{10\}/metal] periodic multilayer films were numerically investigated by applying the theory. Numerical results showed that the main working mode of MSSW propagating in multilayer YIG films is the first order width mode, the dispersion of MSSW can be controlled efficiently by the multilayer periods and the parameters of each layer. It also is influenced by the sample width.