title: Magnetization configurations and magnetization reversal of thin submicron permalloy ellipses with structural defects.
abstract: We have studied the magnetic switching behavior of thin elliptical permalloy films with structural defects by micromagnetic simulations. The nonmagnetic void was found to tend to pin the adjacent magnetic moment, which alters the local equilibrium magnetization patterns and modifies the switching behavior of magnetization. In particular, for the case of voids close to the edge, the curling effect of voids is significant, and induces the occurrence of the multiple-stage modes of magnetization reversal, resulting in a high switching field.
authors.affiliation: Department of Physics, National Taiwan University, Taipei 106, Taiwan.
authors.forename: Ching-Ray
authors.initials: CR
authors.lastname: Chang
authors.forename: Jyh-Shinn
authors.initials: JS
authors.lastname: Yang