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本文建立了具有任意参数多层薄膜结构的窄样品中静磁表面波宽度模的普遍色散关系 ,适用于利用多层薄膜控制静磁表面波色散特性的所有情况 .对两周期 [(YIG/GGG) n/metal]多层膜结构窄样品中静磁表面波宽度模的色散特性进行了数值计算 ,得到了多层膜中的高阶宽度模式 ,多层薄膜结构的参数可以有效地控制静磁表面波的色散特性 ,样品宽度效应对色散也有明显的影响 .根据数值计算结果对不同宽度的YIG薄膜样品在 4 2～ 5 2GHz的频率范围进行实验 ,实验测试结果与理论分析相吻合 .
In this paper, the general dispersion relation of the surface acoustic wave width modes in a narrow sample with a multi-layer thin film with arbitrary parameters is established, which is suitable for all cases of controlling the dispersion characteristics of the static magnetic surface wave with a multi-layer thin film.For two cycles [(YIG / GGG ) n / metal] The dispersion characteristics of the MMW width mode in a narrow sample with multi-layer structure were numerically calculated and the high-order width mode in the multilayer was obtained. The parameters of the multi-layer structure can effectively control the magnetostatic The dispersion of surface wave and the effect of sample width have a significant effect on the dispersion.According to the numerical calculation results, the YIG thin films with different widths are tested in the frequency range of 4 2 ~ 5 2GHz, and the experimental results are in good agreement with the theoretical analysis.