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Lee, Ki-Suk
Creative Lab. for Advanced Spin Systems (CLASS)
Research Interests
  • Magnetism, spintronics, spin dynamics, rare-earth free magnet

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Normal modes of coupled vortex gyration in two spatially separated magnetic nanodisks

Cited 11 times inthomson ciCited 7 times inthomson ci
Title
Normal modes of coupled vortex gyration in two spatially separated magnetic nanodisks
Author
Lee, Ki-SukJung, HyunsungHan, Dong-SooKim, Sang-Koog
Keywords
Coupled vortices; Eigen frequencies; Elliptical orbits; Micromagnetics; Nanodisks; Normal modes
Issue Date
2011-12
Publisher
AMER INST PHYSICS
Citation
JOURNAL OF APPLIED PHYSICS, v.110, no.11, pp.1 - 5
Abstract
We found from analytical derivations and micromagnetic numerical simulations that there exist two distinct normal modes in apparently complex vortex gyrotropic motions in two dipolar-coupled magnetic nanodisks. The normal modes have characteristic higher and lower single angular eigenfrequencies with their own elliptical orbits elongated along the x (bonding axis) and y axes, respectively. The superposition of the two normal modes results in coupled vortex gyrations, which depend on the relative vortex-state configuration in a pair of dipolar-coupled disks. This normal-mode representation is a simple means of understanding the observed complex vortex gyrations in two or more dipolar-interacting disks of various vortex-state configurations.
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DOI
10.1063/1.3662923
ISSN
0021-8979
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MSE_Journal Papers
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