Journal of the Korean Magnetics Society (한국자기학회지)

The Korean Magnetics Society (한국자기학회)
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Three-Dimensional Dynamics of Magnetic Vortex Core in a Nanodisk

나노디스크에서의 자기 소용돌이 핵의 3차원 동역학 연구

  • Moon, Jung-Hwan (Department of Materials Science of Engineering, Korea University) ;
  • Lee, Kyung-Jin (Department of Materials Science of Engineering, Korea University) ;
  • Kim, Dong-Hyun (Department of Physics, Chungbuk National University) ;
  • Piao, Hong-Guang (Department of Physics, Chungbuk National University)
  • Received : 2012.11.20
  • Accepted : 2012.12.14
  • Published : 2012.12.31
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Abstract

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.

전산모사를 이용하여, 자기소용돌이의 공진 주파수에 대한 두께 의존성을 조사하였다. 자기소용돌이의 공진 주파수는 2차원(2D)과 3차원(3D) 계산결과 모두 두께가 두꺼워짐에 따라 증가하는 경향을 보였다. 그러나 2D와 3D 계산 결과는 두께가 두꺼워짐에 따라 차이를 보였는데, 이는 3D 계산과 달리 2D 계산에서는 두께가 증가함에 따라 두께방향으로 발생하는 불균질한 자화 구조를 고려하지 않았기 때문이다.

Keywords

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