Domain structures and current-controlled switching characteristics of micron sized permalloy structures with varying aspect ratio

Abstract

Ni80Fe20 magnetic structures were fabricated by electron beam lithography and evaporation on top of a conductor. A current passing through the conductor was used to induce a field across the structures. Magnetic force microscopy was used to study the domain changes of the remanent structures after every increment of current. The effect of changing aspect ratio in the structures was studied. Simulation was also conducted using Object-Oriented Micro-Magnetic Framework to compare with the experimental results. © 2006 Materials Research Society.