Properties of thick-walled cylindrical magnetic domains in uniaxial platelets

Abstract

Additional properties are reported for the thick‐walled domain model introduced in a previous paper. Substantial magnetostatic wall broadening is shown to occur when the dimensionless anisotropy ${\mathrm{q\equiv K}}_u{\text{/2π\hspace{0.17em}M}}_s^2$ is of the order q≲3. When q ∼ 1, the wall thickness may be as much as 75% larger than the wall thickness of the corresponding infinite planar Bloch wall, l_w=π(A/K_u)^1/2. The size and range of variation of the wall thickness are shown to preclude the formulation of a useful generalization of the usual bubble force equation unless q≳3. Several parameters of particular relevance to device work are presented as functions of q, and a brief treatment of the interaction of thick‐walled bubbles is given.