FORC and Micromagnetism Approach to the Domain Structure of Cobalt Antidot Arrays

TL;DR

This study investigates how porosity affects the magnetic domain structure of cobalt antidot arrays using micromagnetic simulations and magnetometry, revealing pore size-dependent coercivity and domain interactions.

Contribution

It introduces a combined micromagnetic and experimental approach to analyze the impact of pore size on domain behavior in cobalt antidot films.

Findings

Coercivity increases with pore diameter.

Larger pores lead to dominant domain-domain interactions.

Domain reversibility is affected by porosity.

Abstract

We study the influence of the porosity on the domain structure of cobalt antidots thin films with controlled and circular defects of 20, 40 and 60 nm of diameter. Micromagnetic simulations, combined with First-order reversal curves analysis of classical magnetometry measurements, have been used to track the evolution of the magnetic domain configurations. The found coercivity enhancement with the increase of the pore diameter is correlated to the domain reversibility. Moreover, we found that when the pores diameter increases the domain-domain interactions become dominant.