Angular dependence of magnetic properties in Ni nanowire arrays

TL;DR

This study investigates how the magnetic properties of nickel nanowire arrays vary with angle, revealing that magnetization reversal occurs via transverse wall nucleation and propagation, explained through an adapted Stoner-Wohlfarth model.

Contribution

The paper introduces an analytical model explaining the angular dependence of coercivity in Ni nanowire arrays, supported by experimental measurements.

Findings

Magnetization reversal is driven by transverse wall nucleation.

Angular dependence of coercivity is explained by an adapted Stoner-Wohlfarth model.

Experimental results align with the analytical calculations.

Abstract

The angular dependence of the remanence and coercivity of Ni nanowire arrays produced inside the pores of anodic alumina membranes has been studied. By comparing our analytical calculations with our measurements, we conclude that the magnetization reversal in this array is driven by means of the nucleation and propagation of a transverse wall. A simple model based on an adapted Stoner-Wohlfarth model is used to explain the angular dependence of the coercivity.