中国物理B ›› 2025, Vol. 34 ›› Issue (6): 67507-067507.doi: 10.1088/1674-1056/add24c

所属专题： SPECIAL TOPIC — Advanced magnonics

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Magnon behavior in YIG film under microwave excitation investigated by Brillouin light scattering

Guofu Xu(徐国服)1, Kang An(安康)1, Wenjun Ma(马文俊)1, Xiling Li(李喜玲)1, C. K. Ong1,2, Chi Zhang(张驰)1,†, and Guozhi Chai(柴国志)1,‡   

  1. 1 Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University, Lanzhou 730000, China;
    2 Department of Physics, Xiamen University Malaysia, Jalan Sunsuria, Bandar Sunsuria, 43900 Sepang, Selangor, Malaysia
  • 收稿日期:2025-04-01 修回日期:2025-04-30 接受日期:2025-04-30 出版日期:2025-05-16 发布日期:2025-06-06
  • 通讯作者: Chi Zhang, Guozhi Chai E-mail:zc@lzu.edu.cn;chaigzh@lzu.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 52471200, 12174165, and 52201219).

Magnon behavior in YIG film under microwave excitation investigated by Brillouin light scattering

Guofu Xu(徐国服)1, Kang An(安康)1, Wenjun Ma(马文俊)1, Xiling Li(李喜玲)1, C. K. Ong1,2, Chi Zhang(张驰)1,†, and Guozhi Chai(柴国志)1,‡   

  1. 1 Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University, Lanzhou 730000, China;
    2 Department of Physics, Xiamen University Malaysia, Jalan Sunsuria, Bandar Sunsuria, 43900 Sepang, Selangor, Malaysia
  • Received:2025-04-01 Revised:2025-04-30 Accepted:2025-04-30 Online:2025-05-16 Published:2025-06-06
  • Contact: Chi Zhang, Guozhi Chai E-mail:zc@lzu.edu.cn;chaigzh@lzu.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 52471200, 12174165, and 52201219).

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摘要： We utilize conventional wave-vector-resolved Brillouin light scattering technology to investigate the spin wave response in YIG thin films under high-power microwave excitation. By varying the microwave frequency, external bias magnetic field, and in-plane wave vector, in addition to observing the dipole-exchange spin waves excited by parallel parametric pumping, we further observe broadband spin wave excitation within the dipole-exchange spin wave spectrum. This broadband excitation results from the combined effects of parallel and perpendicular parametric pumping, induced by irregularities in the excitation geometry, as well as magnon-magnon scattering arising from the absence of certain spin wave modes. Our findings offer new insights into the mechanisms of energy dissipation and relaxation processes caused by spin wave excitation in magnetic devices operating at high power.

关键词: spin wave, parametric excitation, magnon interaction, Brillouin light scattering

Abstract: We utilize conventional wave-vector-resolved Brillouin light scattering technology to investigate the spin wave response in YIG thin films under high-power microwave excitation. By varying the microwave frequency, external bias magnetic field, and in-plane wave vector, in addition to observing the dipole-exchange spin waves excited by parallel parametric pumping, we further observe broadband spin wave excitation within the dipole-exchange spin wave spectrum. This broadband excitation results from the combined effects of parallel and perpendicular parametric pumping, induced by irregularities in the excitation geometry, as well as magnon-magnon scattering arising from the absence of certain spin wave modes. Our findings offer new insights into the mechanisms of energy dissipation and relaxation processes caused by spin wave excitation in magnetic devices operating at high power.

Key words: spin wave, parametric excitation, magnon interaction, Brillouin light scattering

中图分类号:  (Spin waves)

  • 75.30.Ds
76.50.+g (Ferromagnetic, antiferromagnetic, and ferrimagnetic resonances; spin-wave resonance) 52.35.Mw (Nonlinear phenomena: waves, wave propagation, and other interactions (including parametric effects, mode coupling, ponderomotive effects, etc.)) 78.35.+c (Brillouin and Rayleigh scattering; other light scattering)