MICROMAGNETICS OF POLYCRYSTALLINE 2-DIMENSIONAL PLATELETS

A numerical micromagnetic technique is used to simulate magnetization processes in two-dimensional thin metallic platelets. The platelets ar e modeled as an array of interacting polycrystalline grains. The techn ique assumes a triangular discretization at the subgrain level with th e magnetization varying linearly over each triangle. The coupling betw een the grains has a profound effect on the;magnetic structure of the platelets as does the grain size. For systems with strongly exchange c oupled grains, approximately solenoidal magnetization structures exist . A single domain behavior exists for systems with weakly coupled grai ns. The magnetization pattern of the platelets has been characterized by the vorticity of the magnetization vector field. (C) 1996 American Institute of Physics.