Magnetic properties of Fe/Dy multilayers: a Monte Carlo investigation

TL;DR

This study uses Monte Carlo simulations to explore the magnetic behavior of Fe/Dy multilayers, focusing on how local structural anisotropy influences perpendicular magnetic anisotropy in amorphous multilayer systems.

Contribution

It introduces a model incorporating nanoclusters and anisotropy effects to explain magnetic anisotropy in transition metal/rare earth multilayers.

Findings

Competition between uniaxial and random anisotropy affects magnetic properties.

Nanoclusters influence the overall magnetic anisotropy.

Model explains the origin of perpendicular magnetic anisotropy.

Abstract

We investigate the magnetic properties of a Heisenberg ferrimagnetic multilayer by using Monte Carlo simulations. The aim of this work is to study the local structural anisotropy model which is a possible origin of the perpendicular magnetic anisotropy in transition metal/rare earth amorphous multilayers. We have considered a face centered cubic lattice where each site is occupied by a classical Heisenberg spin. We have introduced in our model of amorphous multilayers a small fraction of crystallized Fe-Dy nanoclusters with a mean anisotropy axis along the deposition direction. We show that a competition in the energy terms takes place between the mean uniaxial anisotropy of the Dy atoms in the nanoclusters and the random anisotropy of the Dy atoms in the matrix.