Einstein-de Haas phase shifts in surface acoustic waves
Einstein-de Haas phase shifts in surface acoustic waves
复制标题
声表面波中的爱因斯坦-德哈斯相移
DOI：
10.1103/physrevb.104.l020404
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发表时间：
2021
影响因子：
3.7
通讯作者：
Nozaki Yukio
中科院分区：
文献类型：
--
作者：
Tateno Shoma;Kurimune Yuki;Matsuo Mamoru;Yamanoi Kazuto;Nozaki Yukio
我们证明了基于旋磁爱因斯坦-德哈斯(EDH)力矩的铁磁性薄膜中瑞利型声表面波(RSAW)的相移可以归因于自旋波激发的反向作用。EDH力矩调制体声波的横向速度，从而导致RSAW的双极相移。与磁弹性力矩相比，提高频率可以更显著地提高相移。RSAW中的旋磁力矩为控制旋转机电设备铺平了道路，而不需要特定材料特有的磁弹性力矩。
We demonstrate the phase shift of the Rayleigh-type surface acoustic wave (RSAW) in a ferromagneticfilm based on the gyromagnetic Einstein–de Haas (EdH) torque that can be attributed to the back action of spin-wave excitation. The EdH torque modulates the transverse velocity of the bulk acoustic wave that causes the bipolar phase shift of RSAW. When compared with a magnetoelastic torque, the phase shift can be more prominently enhanced by increasing the frequency. The gyromagnetic torque in the RSAW paves the way for controlling spin-mechatronics devices without magnetoelastic torque which is specific to a certain material.