Dual-frequency microwave-driven resonant excitations of skyrmions in nanoscale magnets

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	Dual-frequency microwave-driven resonant excitations of skyrmions in nanoscale magnets
	H. Wang; Y. Y. Dai; T. Yang; W. J. Ren; Z. D. Zhang
	2014
发表期刊	Rsc Advances
ISSN	2046-2069
卷号	4 期号:107 页码:62179-62185
摘要	Since the first prediction of their existence in magnetic materials, skyrmions have been intensively investigated both theoretically and experimentally. However, it remains a challenge to manipulate skyrmions and to understand their dynamics. We study nonlinear dynamics of coupled skyrmions in Co/Ru/Co nanodisks by micromagnetic simulations and show that resonant excitation can be controlled in nanoscale magnets by a dual-frequency microwave field. Two coupled resonant modes, clockwise (CW) and counterclockwise (CCW) rotation modes, are found. Polygon-like resonant excitation is observed and modulated from triangle-like to heptagon-like dynamics by a microwave field with a commensurate frequency ratio. The quasiperiodic behavior of the excitation is related to an incommensurate ratio. We also present numerical solutions of the extended Thiele's equation for skyrmions and obtain a good agreement between the solutions and the micromagnetic simulation results. This work contributes to the understanding of skyrmion dynamics and supplies a new route to manipulating skyrmions in nanoscale magnets using resonant excitation.
部门归属	[zhang, zhidong] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. chinese acad sci, int ctr mat phys, shenyang 110016, peoples r china. ; zhang, zd (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, peoples r china. ; zdzhang@imr.ac.cn
关键词	Vortex Core Dynamics Multilayers Reversal Lattice
URL	查看原文
语种	英语
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/73404
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	H. Wang,Y. Y. Dai,T. Yang,et al. Dual-frequency microwave-driven resonant excitations of skyrmions in nanoscale magnets[J]. Rsc Advances,2014,4(107):62179-62185.
APA	H. Wang,Y. Y. Dai,T. Yang,W. J. Ren,&Z. D. Zhang.(2014).Dual-frequency microwave-driven resonant excitations of skyrmions in nanoscale magnets.Rsc Advances,4(107),62179-62185.
MLA	H. Wang,et al."Dual-frequency microwave-driven resonant excitations of skyrmions in nanoscale magnets".Rsc Advances 4.107(2014):62179-62185.