A route towards finding large magnetic anisotropy in nano-composites: application to a W$_{1-x}$Re$_x$/Fe multilayer

TL;DR

This paper proposes a novel nano-laminate with enhanced magnetic hardness and large saturation moment, demonstrating high magnetic anisotropy suitable for advanced magnetic applications.

Contribution

It introduces a new nano-laminate structure with significantly increased magnetic anisotropy and provides a method to identify other promising magnetic multilayer materials.

Findings

Magnetic anisotropy reaches 5.3-7.0 MJ/m³ depending on alloying.

The proposed nano-laminate has a large saturation magnetic moment.

A recipe for identifying other high-anisotropy magnetic materials is provided.

Abstract

We suggest here a novel nano-laminate, 5[Fe]/2[W$_x$Re$_{1-x}$] (x=0.6-0.8), with enhanced magnetic hardness in combination with a large saturation moment. The calculated magnetic anisotropy of this material reaches values of 5.3-7.0 MJ/m$^3$, depending on alloying conditions. We also propose a recipe in how to identify other novel magnetic materials, such as nano-laminates and multilayers, with large magnetic anisotropy in combination with a high saturation moment.