柱状構造をした垂直磁化膜におけるバックリング様式の可能性 (<特集>垂直磁気記録)

概要

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To investigate the possibility of a magnetization-buckling mode in a perpendicular magnetic film with columnar structure, the magnetic energy of the film is calculated on the assumption that the film is a two-dimensional array of dingle-domain prisms. From the energy, the nucleation field H_N is calculated and compared with H_N for the magnetization-curling and coherent-rotation modes. It is found that the magnetization rotates in the coherent-rotation mode for a small reduced-radius S and in the curling mode for a large S. The buckling mode occurs in the range of S between the ranges for the coherent-rotation and curling modes. However, the range of S in which the buckling mode occurs is very small or non-existent when the space between the crystallites and the axial ratio of the crystallite constituting the film are small. Moreover, H_N in the buckling mode is very close to H_N in the coherent-rotation mode. Therefore the buckling mode need not be taken into account in perpendicular magnetic films with columnar structure.
社団法人日本磁気学会の論文
1997-04-15