论文标题
雷利和剪切水平磁声波的磁弹性相互作用的对称性在litao上$ _3 $上的镍薄膜中
Symmetry of the Magnetoelastic Interaction of Rayleigh and Shear Horizontal Magnetoacoustic Waves in Nickel Thin Films on LiTaO$_3$
论文作者
论文摘要
我们研究了雷利和剪切水平表面声波（锯）的相互作用（锯）在压电litao $ _3 $底物上与薄ni膜中的自旋波和旋转波的相互作用，该薄膜同时支持两种锯模式。因为瑞利和剪切水平模式在Ni薄膜中诱导不同的应变成分，磁弹性驱动场的对称性，磁弹性响应的对称性以及两种锯模式的透射非交流均不同。我们的实验发现通过基于修改的Landau--Lifshitz-Gilbert方法的理论模型很好地解释了。我们表明，由雷利（Rayleigh）和剪切水平锯驱动的磁弹性响应的对称性相互补充，这使得有可能激发自旋波，以实现磁化的任何相对取向以及锯式的传播方向，并且可以利用来表征未知声波模式的未知声波模式的表面应变成分。
We study the interaction of Rayleigh and shear horizontal surface acoustic waves (SAWs) with spin waves in thin Ni films on a piezoelectric LiTaO$_3$ substrate, which supports both SAW modes simultaneously. Because Rayleigh and shear horizontal modes induce different strain components in the Ni thin films, the symmetries of the magnetoelastic driving fields, of the magnetoelastic response, and of the transmission nonreciprocity differ for both SAW modes. Our experimental findings are well explained by a theoretical model based on a modified Landau--Lifshitz--Gilbert approach. We show that the symmetries of the magnetoelastic response driven by Rayleigh- and shear horizontal SAWs complement each other, which makes it possible to excite spin waves for any relative orientation of magnetization and SAW propagation direction and, moreover, can be utilized to characterize surface strain components of unknown acoustic wave modes.
