Temperature-dependent charge transport in the compensated ferrimagnet Mn$_{1.5}$V$_{0.5}$FeAl from first principles

TL;DR

This study uses first-principles calculations to analyze how temperature and disorder affect charge transport and the anomalous Hall effect in the compensated ferrimagnet Mn$_{1.5}$V$_{0.5}$FeAl, aligning well with experimental data.

Contribution

It provides a detailed ab-initio analysis of temperature-dependent transport properties in a specific compensated ferrimagnet, including the role of disorder and the anomalous Hall effect.

Findings

Good agreement with experimental transport measurements

Anomalous Hall effect occurs despite zero net spin moment

Disorder significantly influences transport properties

Abstract

We present an ab-initio study of the temperature-dependent longitudinal and anomalous Hall resistivities in the compensated collinear ferrimagnet Mn$_{1.5}$V$_{0.5}$FeAl. Its transport properties are calculated using the general fully relativistic Kubo--Bastin formalism and their temperature dependency is accounted for magnetic and structural disorder. Both scattering sources, together with the residual chemical disorder, were treated equally provided by the CPA (Coherent Potential Approximation) SPR-KKR (Spin-Polarized Relativistic Korringa-Kohn-Rostoker) method. All calculated properties showed good agreement with a recent experimental results, providing useful specific information on the chemical and magnetic arrangement as well as on the influence of disorder. Finally, we demonstrated that the anomalous Hall effect in such compensated systems occurs regardless of the vanishing net spin moment.