Journal of Magnetics

  • 제12권3호
  • /
  • Pages.113-117
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  • 2007
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  • 1226-1750(pISSN)
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  • 2233-6656(eISSN)
한국자기학회 (The Korean Magnetics Society)
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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)
  • 발행 : 2007.09.30
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초록

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.

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참고문헌

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피인용 문헌

  1. Double Vortex Interaction in Micron-Sized Elliptical Ni$_{80}$Fe$_{20}$ Elements Studied by Real-Time Kerr Microscopy vol.45, pp.6, 2009, https://doi.org/10.1109/TMAG.2009.2018680
  2. Collective dynamics of magnetic vortices in an array of interacting nanodots vol.101, pp.8, 2015, https://doi.org/10.1134/S0021364015080068
  3. On the low-frequency resonance of magnetic vortices in micro- and nanodots vol.57, pp.1, 2015, https://doi.org/10.1134/S1063783415010151
  4. Zero-Bias-Field Spin Torque Induced Oscillation of a Vortex Core in a Magnetic Junction Nano-Pillar with High Magnetoresistance Ratio vol.86, pp.6, 2017, https://doi.org/10.7566/JPSJ.86.064805
  5. Magnetization Dynamics in Two-Dimensional Arrays of Square Microelements vol.126, pp.4, 2018, https://doi.org/10.1134/S1063776118040118
  6. Collective motion of magnetization in two-dimensional arrays of square elements vol.91, pp.5, 2018, https://doi.org/10.1140/epjb/e2018-90006-0