Interaction between surface acoustic waves and spin waves in a ferromagnetic thin film
Interaction between surface acoustic waves and spin waves in a ferromagnetic thin film
复制标题
铁磁薄膜中表面声波和自旋波之间的相互作用
DOI：
10.1016/j.jmmm.2021.168672
复制
发表时间：
2021
影响因子：
2.7
通讯作者：
Sadamichi Maekawa
中科院分区：
文献类型：
--
作者：
Kei Yamamoto ; Mingran Xu ; Jorge Puebla ; Yoshichika Otani ; Sadamichi Maekawa
本文从理论上描述了含铁磁薄膜多层结构中磁振子-声子相互作用。该方法适用于任意方向的外磁场和各种类型的声波，包括瑞利和勒夫表面模式。一个特别注意的是支付的声波模式的空间分布和有效耦合系数的解析表达式推导考虑到自旋波和声波之间的模式轮廓重叠的程度。结果被应用于再现一个强各向异性和非互易线宽的声学铁磁共振在最近的实验报告。
We present a theoretical description of magnon–phonon interactions in a multilayer structure containing a ferromagnetic thin film. The formalism is applicable to an arbitrary direction of external magnetic field and various types of acoustic waves including Rayleigh and Love surface modes. A particular attention is paid to the spatial profile of the acoustic wave modes and analytical expressions for the effective coupling coefficients are derived taking into account the degree of mode profile overlap between spin waves and acoustic waves. The results are applied to reproduce a strongly anisotropic and non-reciprocal linewidth of acoustic ferromagnetic resonance reported in a recent experiment.