Work

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

Year: 2023

Type: article

Abstract: 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 ${\mathrm{Ni}}_{81}{\mathrm{Fe}}_{19}$/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.

Source: Physical review. B./Physical review. B

DOI: 10.1103/physrevb.107.134401

Authors: Mingxian Huang, Wenbin Hu, Huaiwu Zhang, Feiming Bai

Institutions: University of Electronic Science and Technology of China, State Key Laboratory of Electronic Thin Films and Integrated Devices

Language: English

Topic: Magnetic properties of thin films

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: National Natural Science Foundation of China, Natural Science Foundation of Sichuan Province

Awards: G5414976837, 面向甚高频片上功率电源的磁芯膜功率电感研究