Micromagnetics of ferromagnetic/antiferromagnetic nanocomposite materials. Part I: Towards the mesoscopic approach

TL;DR

This paper introduces a novel mesoscopic micromagnetic modeling approach for ferromagnetic/antiferromagnetic nanocomposites, validated against atomistic models, enabling detailed magnetization analysis at nanometer resolution over larger scales.

Contribution

It presents a new mesoscopic modeling method derived from atomistic simulations for ferromagnetic/antiferromagnetic materials, bridging small-scale details with larger-scale analysis.

Findings

Validation against atomistic models confirms accuracy.

Method captures magnetization distribution at nanometer resolution.

Applicable to complex nanocomposite materials.

Abstract

In the first of two articles, we present here a novel mesoscopic micromagnetic approach for simulating materials composed of ferromagnetic and antiferromagnetic phases. Starting with the atomistic modeling of quasi one-dimensional systems, we explicitly show how the material parameters for the mesoscopic model of an antiferromagnet can be derived. The comparison between magnetization profiles obtained in atomistic and mesoscopic calculations (using a Heusler alloy as an example) proves the validity of our method. This approach opens up the possibility to recover the details of the magnetization distribution in ferromagnetic/antiferromagnetic materials with the resolution of a few nanometers covering length scales up to several hundreds of nanometers.