Systematic investigation of surface acoustic wave-driven ferromagnetic resonance: Model and simulation
Year: 2025
Type: article
Abstract: A theoretical model is presented to describe the surface acoustic wave-driven ferromagnetic resonance (SAW-FMR), systematically and effectively explaining the results of the previous experiment. In our model, the precessional cone angle δθ and the power attenuation ΔP are employed to represent the intensity of FMR. The expression of δθ can be divided into three independent parts: a constant term, a frequency-dependent term, and a surface acoustic wave (SAW) equivalent field term; each part is expressed explicitly with various parameters. To deeply understand the special field-sweeping SAW power attenuation spectrum patterns observed in previous experiments, we creatively interpret δθ as a combination of the resonant frequency f0 spectrum and SAW equivalent field |sin(2φM)| spectrum. It is the distinctive SAW equivalent term |sin(2φM)| that makes SAW attenuation spectrum an incomplete pattern compared to traditional electromagnetic wave (EMW). Furthermore, we discuss the influence of multiple factors on the SAW-FMR, including the external magnetic field magnitude and direction, SAW frequency and amplitude, as well as the magnetocrystalline anisotropy direction and distribution. To validate our theoretical model, micromagnetic simulations are also carried out in the corresponding situations.
Source: Frontiers of Physics
Authors: Huaidong Li, Jianbo Wang, Jiangtao Xue, Jiaming Li, Yuchen Ye, Jinxuan Shi, Fengrui Zhang, Chenbo Zhao, Jinwu Wei, Xiaoxi Liu, Qingfang Liu
Institution: Lanzhou University
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: bronze
Awards: G1637497510, G2710384088, G8274202400
OpenAlex ID: W4414445894