Magnetization reversal of dipolar coupled nanomagnets studied by two-dimensional electron gas based micro-Hall magnetometry

TL;DR

This study combines micro-Hall magnetometry and micromagnetic simulations to investigate the complex magnetization reversal processes in dipolar coupled NiFe nanomagnets arranged in a double ring geometry.

Contribution

It introduces a combined experimental and simulation approach to analyze magnetization reversal in nanomagnets with complex interactions.

Findings

Micro-Hall magnetometry detects complex reversal features.

Micromagnetic simulations agree with experimental data.

Reversal processes involve intricate magnetic state transitions.

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 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 is observed as specific features in micro-Hall magnetometry data which compares well with the micromagnetic simulation data.