Computer Simulation of Magnetic Bubble Domain Wall Motion

Abstract

Methods of calculating the motion of a magnetic bubble with magnetization structure along the domain wall are presented together with results on a bubble without Bloch lines on the domain wall. The calculation is based on equations of wall motion derived from the Gilbert equation by assuming that a slowly moving domain wall has a magnetization configuration similar to static wall structure. A fast numerical scheme analogous to the so-called implicit solution of a parabolic partial differential equation is developed to make it practical to simulate bubble motions occurring in a relatively long time lapse. The principle of calculation and resluts showing the validity and capability of the formulation are given.