Coupling of magnon modes in nanodisk with spin texture

doi:10.1088/1674-1056/ade426

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.

Keywords: coupling magnon chiral spin texture micromagnetic simulation

Received: 31 March 2025
Revised: 12 June 2025
Accepted manuscript online: 13 June 2025

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

Fund: 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).

Corresponding Authors: Fusheng Ma
E-mail: phymafs@njnu.edu.cn

Cite this article:

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) Coupling of magnon modes in nanodisk with spin texture 2025 Chin. Phys. B 34 107506

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Coupling of magnon modes in nanodisk with spin texture

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