Magnetic properties of Co/Cu/Py antidot films

TL;DR

This study investigates how pore size and multilayer structure in Co/Cu/Py antidot films influence their magnetic properties, revealing tunable coercivity and complex magnetization reversal behaviors.

Contribution

It introduces a method to control magnetic coercivity in multilayer antidot films by adjusting pore sizes and layer composition, supported by experimental and simulation analysis.

Findings

Pore size affects coercivity and magnetization steps.

Multilayer structures exhibit distinct reversal processes.

Micromagnetic simulations match experimental results.

Abstract

The magnetic properties of ordered nanoscale Co/Cu/Py multilayer antidot films with different pore sizes prepared on top of nanoporous alumina membranes are presented. By using Co and Py films separated by a Cu thin layer, and tuning the pore diameters of the NAMs we were able to play with the coercivity of the films and observe stepped magnetization curves, as a consequence of the different coercivities of the Co and Py films. The magnetic properties of the multilayer antidots have been measured and compared with results obtained for antidots of Cu/Py. The magnetization reversal process that occurs in each individual layer and in the multilayer was studied by means of micromagnetic simulations.