Giant spin-vorticity coupling excited by shear-horizontal surface acoustic waves

被引：4

作者：

Huang, Mingxian ^{[1
]}

Hu, Wenbin ^{[1
]}

Zhang, Huaiwu ^{[1
]}

Bai, Feiming ^{[1
]}

机构：

[1] Univ Elect Sci & Technol China, State Key Lab Elect Thin Films & Integrated Device, Chengdu 610054, Peoples R China

来源：

PHYSICAL REVIEW B | 2023年 / 107卷 / 13期

基金：

中国国家自然科学基金;

关键词：

Engineering Village;

D O I：

10.1103/PhysRevB.107.134401

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A nonmagnetic layer can inject spin-polarized currents into an adjacent ferromagnetic layer via spin-vorticity coupling (SVC), inducing spin wave resonance (SWR). In this work, we present the theoretical model of SWR generated by shear-horizontal surface acoustic wave (SH-SAW) via SVC, which contains distinct vorticities from well-studied Rayleigh SAW. Both Rayleigh-and SH-SAW delay lines have been designed and fabricated with a Ni81Fe19/Cu bilayer integrated on ST-cut quartz. Given the same wavelength, the measured power absorption of SH-SAW is four orders of magnitudes higher than that of the Rayleigh SAW. In addition, a high-order frequency dependence of the SWR is observed in the SH-SAW, indicating that SVC can be strong enough to compare with magnetoelastic coupling.

引用

页数：10

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