磁位を利用したマイクロマグネティックスのための高速シミュレーション

抄録

  A fast simulation program is constructed that solves the Landau-Lifshitz--Gilbert equation and in which the demagnetizing field is derived from magnetic potentials within the magnetic substance. The Poisson and Laplace equations are solved iteratively to obtain the potentials. The initial values for iteration are predicted by using the values at previous time steps. The process of magnetization switching of square prism in the curling mode is simulated to demonstrate the validity and the capability of the program. The derived program is found to have a computing speed 20 times as fast as that of a similar program based on the conventional calculation of the demagnetizing field when the computing region consists of 30 × 30 cells.