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No.3(pp.93-132)

Home > Issues > Volume 12 (2007) > No.3(pp.93-132)

Simple Harmonic Oscillation of Ferromagnetic Vortex Core

Journal of Magnetics, Volume 12, Number 3, 30 Sep 2007, Pages 113-117

Jun-Yeon Kim(Department of Physics and Astronomy, Seoul National University), Sug-Bong Choe*

(Department of Physics and Astronomy, Seoul National University)

Abstract

Here we report a theoretical description of ferromagnetic vortex dynamics. Based on Thiele's formulation of the Landau-Lifshitz-Gilbert equation, the motion of the vortex core could be described by a function of the vortex core position. Under a parabolic potential generated in the circular magnetic patterns, the vortex core showed a circular rotation-namely the gyrotropic motion, which could be described by a 2-dimensional simple harmonic oscillator. The gyrotropic frequency and apparent damping constant were predicted and compared with the values obtained micromagnetic calculation.

Keywords: ferromagnetic vortex; vortex dynamics; micromagnetic calculation

DOI: 10.4283/JMAG.2007.12.3.113

Full Text: PDF

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