Magnetization Reversal Process in 3D Permalloy Nanomatrix

Abstract

A 3D matrix created by self-alignment of nanowires and 2D antidots is reported. Interactions between nanowires and antidots leading to non-conventional magnetic properties in the 3D matrix are reported. While the easy-axis magnetization of the 3D matrix is dominated by shape anisotropy of the nanowires, the hard-axis magnetization reversal behavior is driven by the bottom 2D antidots. Detailed analysis reveals a defect-induced domain wall propagation process for the easy-axis-reversal process. Micromagnetic simulations show good agreement with experimental results.