Effects of material parameters on the magnetization process in a sub-micron strip pattern have been studied by micromagnetic simulations. A grain structure in the thin film is modeled by a discretized square element array. A structural parameter is introduced considering discontinuous film structure. The exchange stiffness is also varied as parameters. Simulated transverse susceptibility χ and the longitudinal magnetization reversal field Hrev in continuous film structure are somewhat smaller than the analytical predictions based on the coherent rotation model. The values of χ and Hrev significantly decrease with the decrease of inter-grain coupling due to discontinuous structure. Numerical analysis for transients of the internal energy during the magnetization process reveals that the demagnetizing term dominates the transverse magnetization process. While, the demagnetizing and exchange energy terms comparatively contribute to the potential barrier for the longitudinal magnetization reversal. Various types of micromagnetic configurations of edge-curl, buckling and vortex were observed in the magnetization reversal depending on the material parameters.
|ジャーナル||Journal of Magnetism and Magnetic Materials|
|出版ステータス||Published - 1999 6 1|
|イベント||Proceedings of the 1998 3rd International Symposium on Metallic Multilayers (MML-98) - Vancouver, BC, Can|
継続期間: 1998 6 14 → 1998 6 19
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics