Computer Simulation of Magnetic Bubble Domain Bloch Lines Motion

An efficient numerical method has been developed to simulate the motion of magnetic domain wall having vertical Bloch lines on the basis of a previously-derived equation of wall motion. Results on the steady-state motion of a planar wall with periodically spaced Bloch lines agree well with the predictions of an earlier theory. Results on the translational motion of a bubble with two Bloch lines agree with the theory up to the lowest order in the inverse of the quality factor q : an error term of O ( q -2 ) arises in the simulated deflection angle J due to the inexact nature of the equation of wall motion. Means devised to minimize the calculation time, results showing the validity and versatility of the method, and analysis of the errors in relation to the deflection angle ζ are given.