COMPUTER SIMULATION OF BLOCH LINE AND BLOCH WALL DYNAMICS BY LUMPED-CONSTANT MODEL.

A lumped-constant model, treating forces acting on vertical Bloch lines (VBLs) as a lumped force, was used in a two-dimensional simulation of the motion of Bloch lines and Bloch walls. Relations for forces acting tangentially and normally to the wall were derived. The mobilities of VBL and Bloch walls for single VBL and for VBL pairs were obtained as functions of the time increment ( DELTA t) used with the distance (LL) between grid points as a parameter. The accuracy of the simulation results as compared with theory was within 1 to 2%, depending on both LL and DELTA t.