中国物理B ›› 2026, Vol. 35 ›› Issue (4): 47504-047504.doi: 10.1088/1674-1056/ae3c8c

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Hybridization between chiral nutation modes in ferrimagnets

Yihang Duan(段懿航)1,2 and Ka Shen(沈卡)1,2,†   

  1. 1 The Center for Advanced Quantum Studies and School of Physics and Astronomy, Beijing Normal University, Beijing 100875, China;
    2 Key Laboratory of Multiscale Spin Physics, Ministry of Education, Beijing Normal University, Beijing 100875, China
  • 收稿日期:2025-11-19 修回日期:2026-01-05 接受日期:2026-01-23 发布日期:2026-04-07
  • 通讯作者: Ka Shen E-mail:kashen@bnu.edu.cn
  • 基金资助:
    This work was supported by the National Natural Science Foundation of China (Grant No. 12374100) and the Fundamental Research Funds for the Central Universities.

Hybridization between chiral nutation modes in ferrimagnets

Yihang Duan(段懿航)1,2 and Ka Shen(沈卡)1,2,†   

  1. 1 The Center for Advanced Quantum Studies and School of Physics and Astronomy, Beijing Normal University, Beijing 100875, China;
    2 Key Laboratory of Multiscale Spin Physics, Ministry of Education, Beijing Normal University, Beijing 100875, China
  • Received:2025-11-19 Revised:2026-01-05 Accepted:2026-01-23 Published:2026-04-07
  • Contact: Ka Shen E-mail:kashen@bnu.edu.cn
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (Grant No. 12374100) and the Fundamental Research Funds for the Central Universities.

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摘要： The hybridization between ferrimagnetic magnons of different chiralities holds potentials for applications in the design of magnonic devices. Whereas the nutation mode observed in the ferromagnetic film also possesses opposite chirality to precessional magnon mode, in the present work, we study the interplay of the nutation modes and chiral magnons in ferrimagnets with both parallel and antiparallel magnetic configurations based on the inertial Landau-Lifshitz-Gilbert equation. While the two configurations show some general features, such as the individual excitation of the nutation modes and the repulsion between nutation modes and conventional modes, the antiparallel configuration also exhibits a hybridization between two nutation modes and distinct dissipation behaviors, compared to the parallel configuration. A theoretical mode analysis was performed based on a perturbation approach, which nicely reproduces the observations in the simulation and clarifies the key role of the magnetic anisotropy in mode hybridization. Our findings offer a more comprehensive understanding of inertial effects in ferrimagnets, and could be useful for understanding experimental studies on ferrimagnets with non-negligible magnetic inertia.

关键词: ferrimagnet, nutation, magnon, hybridization

Abstract: The hybridization between ferrimagnetic magnons of different chiralities holds potentials for applications in the design of magnonic devices. Whereas the nutation mode observed in the ferromagnetic film also possesses opposite chirality to precessional magnon mode, in the present work, we study the interplay of the nutation modes and chiral magnons in ferrimagnets with both parallel and antiparallel magnetic configurations based on the inertial Landau-Lifshitz-Gilbert equation. While the two configurations show some general features, such as the individual excitation of the nutation modes and the repulsion between nutation modes and conventional modes, the antiparallel configuration also exhibits a hybridization between two nutation modes and distinct dissipation behaviors, compared to the parallel configuration. A theoretical mode analysis was performed based on a perturbation approach, which nicely reproduces the observations in the simulation and clarifies the key role of the magnetic anisotropy in mode hybridization. Our findings offer a more comprehensive understanding of inertial effects in ferrimagnets, and could be useful for understanding experimental studies on ferrimagnets with non-negligible magnetic inertia.

Key words: ferrimagnet, nutation, magnon, hybridization

中图分类号:  (Ferrimagnetics)

  • 75.50.Gg
75.78.-n (Magnetization dynamics) 76.50.+g (Ferromagnetic, antiferromagnetic, and ferrimagnetic resonances; spin-wave resonance) 75.30.Gw (Magnetic anisotropy)