中国物理B ›› 2025, Vol. 34 ›› Issue (10): 107506-107506.doi: 10.1088/1674-1056/ade426

所属专题： SPECIAL TOPIC — Advanced magnonics

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Coupling of magnon modes in nanodisk with spin texture

Zijie Zhou(周子杰), Junning Zhao(赵俊宁), Xinhui Ma(马心慧), Rong Wang(王熔), and Fusheng Ma(马付胜)†   

  1. Key Laboratory of State Manipulation and Advanced Materials in Provincial Universities, Institute of Physics Frontiers and Interdisciplinary Sciences, School of Physics and Technology, Nanjing Normal University, Nanjing 210046, China
  • 收稿日期:2025-03-31 修回日期:2025-06-12 接受日期:2025-06-13 发布日期:2025-10-20
  • 通讯作者: Fusheng Ma E-mail:phymafs@njnu.edu.cn
  • 基金资助:
    This work was supported by the National Key Research and Development Program of China (Grant No. 2023YFF0718400) and the National Natural Science Foundation of China (Grant Nos. 12474119 and 12074189).

Coupling of magnon modes in nanodisk with spin texture

Zijie Zhou(周子杰), Junning Zhao(赵俊宁), Xinhui Ma(马心慧), Rong Wang(王熔), and Fusheng Ma(马付胜)†   

  1. Key Laboratory of State Manipulation and Advanced Materials in Provincial Universities, Institute of Physics Frontiers and Interdisciplinary Sciences, School of Physics and Technology, Nanjing Normal University, Nanjing 210046, China
  • Received:2025-03-31 Revised:2025-06-12 Accepted:2025-06-13 Published:2025-10-20
  • Contact: Fusheng Ma E-mail:phymafs@njnu.edu.cn
  • Supported by:
    This work was supported by the National Key Research and Development Program of China (Grant No. 2023YFF0718400) and the National Natural Science Foundation of China (Grant Nos. 12474119 and 12074189).

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摘要： Magnetic nanostructures with nonhomogeneous magnetic properties exhibit distinct magnon modes, and their interactions are crucial for understanding magnetization dynamics. In this work, we numerically investigate the magnon-magnon coupling in a nanodisk with radially varying magnetic anisotropy by using micromagnetic simulations. By introducing perpendicular magnetic anisotropy into the inner region of the nanodisk, a radially chiral spin texture is observed. The presence of the chiral spin texture results in coupling between the ferromagnetic resonance mode of the whole disk and the higher-order confined modes in the outer region. Moreover, we find that the coupling strength is highly sensitive to the perpendicular magnetic anisotropy, the saturation magnetization, and the interfacial Dzyaloshinskii-Moriya interaction. Our findings could enrich the understanding of the dynamic characteristics of chiral nanomagnets and suggest a possible route to harnessing tunable magnon-magnon coupling for spin-based quantum information processing.

关键词: coupling, magnon, chiral spin texture, micromagnetic simulation

Abstract: Magnetic nanostructures with nonhomogeneous magnetic properties exhibit distinct magnon modes, and their interactions are crucial for understanding magnetization dynamics. In this work, we numerically investigate the magnon-magnon coupling in a nanodisk with radially varying magnetic anisotropy by using micromagnetic simulations. By introducing perpendicular magnetic anisotropy into the inner region of the nanodisk, a radially chiral spin texture is observed. The presence of the chiral spin texture results in coupling between the ferromagnetic resonance mode of the whole disk and the higher-order confined modes in the outer region. Moreover, we find that the coupling strength is highly sensitive to the perpendicular magnetic anisotropy, the saturation magnetization, and the interfacial Dzyaloshinskii-Moriya interaction. Our findings could enrich the understanding of the dynamic characteristics of chiral nanomagnets and suggest a possible route to harnessing tunable magnon-magnon coupling for spin-based quantum information processing.

Key words: coupling, magnon, chiral spin texture, micromagnetic simulation

中图分类号:  (Magnetic anisotropy)

  • 75.30.Gw
75.78.Cd (Micromagnetic simulations ?) 75.75.-c (Magnetic properties of nanostructures) 75.78.-n (Magnetization dynamics)