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http://dx.doi.org/10.4283/JMAG.2007.12.3.113

Simple Harmonic Oscillation of Ferromagnetic Vortex Core  

Kim, Jun-Yeon (Department of Physics and Astronomy, Seoul National University)
Choe, Sug-Bong (Department of Physics and Astronomy, Seoul National University)
Publication Information
Journal of Magnetics / v.12, no.3, 2007 , pp. 113-117 More about this Journal
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;
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