• Title/Summary/Keyword: 자기소용돌이

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Derivation and Numerical Verification of Harmonic Oscillatory Description of Ferromagnetic Vortex Motion (강자기 소용돌이의 단조화 운동 유도 및 수치 검증)

  • Kim, Jun-Yeon;Choe, Sug-Bong
    • Journal of the Korean Magnetics Society
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    • v.18 no.4
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    • pp.127-130
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    • 2008

  • We report a theoretical description of ferromagnetic vortex motion in sub-micrometer size magnetic thin film. Based on Thiele's equation combined with later theoretical achievements, we derive the analytic description of dynamics of ferromagnetic vortex core as a damped harmonic oscillatory motion. Consequently, the relations about frequency and damping constant in damped harmonic oscillation are presented. The validity of the results is verified through micromagnetic simulation.

  • https://doi.org/10.4283/JKMS.2008.18.4.127 인용 PDF KSCI

Three-Dimensional Dynamics of Magnetic Vortex Core in a Nanodisk (나노디스크에서의 자기 소용돌이 핵의 3차원 동역학 연구)

  • Moon, Jung-Hwan;Lee, Kyung-Jin;Kim, Dong-Hyun;Piao, Hong-Guang
    • Journal of the Korean Magnetics Society
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    • v.22 no.6
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    • pp.195-199
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    • 2012

  • Using micromagnetic simulation, we investigated the effect of thickness of a nanodisk on a resonance frequency of vortex gyration. We observed that the resonance frequency increases with increasing thickness in both cases of 2-dimensional (2D) and 3-dimensional (3D) calculation. However, there is a difference in the increasing rate of resonance frequency between 2D and 3D modeling owing to dynamically developed inhomogeneous magnetic texture along the thickness direction of disk in 3D modeling.

  • https://doi.org/10.4283/JKMS.2012.22.6.195 인용 PDF KSCI