The Jaggedness of Domain Wall in the MO Materials by Computer Simulations

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概要

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• Computer simulations for thin films of amorphous rare earth-transition metal alloys which are used for magneto-optical recording media are performed. In these simulations, the recording media are two dimensional lattice of 64×64 magnetic moments with lattice distance 10Å. The motion of the magnetic moments follows the dynamic equation of Landau-Lifshitz-Gilbert(LLG) under the influence of an effective field arising from the local anisotropy, nearest-neighbor exchange, classical dipole-dipole interaction, and an external applied field. According to the LLG equation, we have investigated the process of domain wall formation for a medium with random axis anisotropy δ_θ. For nonzero of δ_θ, it was found that 2π-Bloch wall line appear at the boundaries of magnetic domain and it is jagged. Finally, the effects of exchange stiffness coefficient A_x and anisotropy coefficient K_u on the wall width and the dispersion which represcnts jaggedness of domain wall are studied.

• 社団法人映像情報メディア学会の論文
• 1993-11-12

著者

• Yu Seong-cho

  Department Of Physics Chungbuk National University

• Han Seung

  Department Of Chemical Engineering Ceramic Processing Research Center Hanyang University

• Yu Seong-cho

  Department Of Physics Chung-buk National University:department Of Physics University Of Maryland

• Koo Eun-young

  Department Of Physics Chungbuk National University

• Han Seung

  Department Of Physics Chungbuk National University

• Kim Eun-Goo

  Department of Physics, Chungbuk National University

• Han Seung

  Department Of Biological Sciences Korea Advanced Institute Of Science And Technology

• Kim Eun-goo

  Department Of Physics Chungbuk National University

• Han Seung

  Department of Biological Science, Inje University

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