抄録
Dynamic behaviors of the magnetization ripple in magnetic thin films are studied by means of solving the Landau-Lifshitz-Gilbert equation of motion numerically. In solving the equation, the exchange interaction and the magnetostatic interaction due to the spatially inhomogeneous distribution of the magnetization in addition to the anisotropy field and the external field are taken into account as the effective magnetic field. The oscillation of the magnetization ripple, caused by the sudden application of driving pulse fields, is excited parametrically and built up remarkably by the varying effective field associated with the rotational motion of the magnetization. It is found that the difference of the rotation angle between the most leading and the most lagging portions can be so large as to reach about 50° in the rotational process of the magnetization.
