Transport modeling of Py film with antidot array

Abstract

The formulation of a model based on the transport and anisotropic magnetoresistance (AMR) characteristics of a permalloy magnetic film was presented. The current density distribution (j) was numerically obtained from Poisson equation, while magnetization (M) was calculated using micromagnetic simulation. The linear interpolation of the M and j distributions were then combined to obtain the galvanometric effects. The inhomogeneous current density and magnetization were used for explaining the increase in the peak AMR ratio, due to the reduction in antidot spacings.