The Energy and General Translation Force of Cylindrical Magnetic Domains

Abstract

In this paper we compute the change in the energy of a uniformly magnetized uniaxial platelet produced by the introduction of a cylindrical domain. Differentiation of the energy expression yields the translational force produced by gradients in plate thickness, material composition, or temperature. The force expressions provide a means for estimating the effect of gradients in these parameters on the margins of domain devices. Equating the sum of the gradient produced forces to the drag force yields a general domain velocity expression. The various results are presented in both graphical and tabular form.