Intrinsic switching field distribution of arrays of Ni80Fe20 nanowires probed by $\mathit{in\, situ}$ magnetic force microscopy

TL;DR

This study investigates the magnetization reversal process in low-density Ni80Fe20 nanowire arrays using in situ magnetic force microscopy, revealing a narrower intrinsic switching field distribution compared to densely packed arrays.

Contribution

It provides new insights into the intrinsic switching field distribution in low-density nanowire arrays, highlighting the reduced dipolar interactions.

Findings

Intrinsic switching field distribution is narrower in low-density arrays.

Dipolar interactions are negligible at low packing densities.

Switching behavior varies with nanowire diameter.

Abstract

The progress of magnetization reversal of weakly packed ferromagnetic Ni80Fe20 nanowire arrays of different diameters (40, 50, 70 and 100 nm) electrodeposited in polycarbonate membranes was studied by magnetic force microscopy (MFM). For such a low packing density of nanomagnets, the dipolar interactions between neighbouring wires can be neglected. The intrinsic switching field distribution has been extracted from in situ MFM images and its width was found to be considerably smaller than for densely packed nanowire arrays.