Improvement of magnetic hardness at finite temperatures: ab initio disordered local moment approach for YCo$_5$

TL;DR

This paper presents a first-principles method to analyze and enhance the magnetic hardness of YCo$_5$ at finite temperatures, focusing on magnetocrystalline anisotropy and doping strategies.

Contribution

It introduces a relativistic disordered local moment approach to predict temperature-dependent magnetic properties and proposes hole doping as a means to improve coercivity.

Findings

Temperature-dependent anisotropy energy and magnetization calculated from first principles.

Hole doping strategy can enhance the anisotropy field near room temperature.

Method provides insights for designing better permanent magnets.

Abstract

Temperature dependence of the magnetocrystalline anisotropy energy and magnetization of the prototypical rare-earth magnet YCo$_5$ is calculated from first principles, utilizing the relativistic disordered local moment approach. We discuss a strategy to enhance the finite-temperature anisotropy field by hole doping, paving the way for an improvement of the coercivity near room temperature or higher.