Complex switching behavior of magnetostatically coupled single-domain nanomagnets probed by micro-Hall magnetometry

Abstract

We report here the results of two-dimensional electron gas based micro-Hall magnetometry measurements and micromagnetic simulations of dipolar coupled nanomagnets of Ni80Fe20 arranged in a double square ring-like geometry. We observe that although magnetic force microscopy images exhibit single domain like magnetic states for the nanostructures, their reversal processes may undergo complex behavior. The details of such reversal behavior are observed as specific features in micro-Hall magnetometry data, which are comparable with the micromagnetic simulation data.