Anomalous Nernst effect in perpendicularly magnetised {\tau}-MnAl thin films

TL;DR

This paper investigates the anomalous Nernst effect in -MnAl thin films with perpendicular magnetic anisotropy, demonstrating significant effects at room temperature, which makes -MnAl promising for spin-caloritronic applications.

Contribution

It reports the observation of a robust anomalous Nernst effect in -MnAl thin films at room temperature, highlighting its potential for spin-caloritronic devices.

Findings

Anomalous Nernst effect observed at 200 K and 300 K

Anomalous Nernst coefficient of 0.6V/K at 300 K

Comparable to other perpendicular magnetic anisotropy thin films

Abstract

$\tau$-MnAl is interesting for spintronic applications as a ferromagnet with perpendicular magnetic anisotropy due to its high uniaxial magnetocrystalline anisotropy. Here we report on the anomalous Nernst effect of sputter deposited $\tau$-MnAl thin films. We demonstrate a robust anomalous Nernst effect at temperatures of 200 K and 300 K with a hysteresis similar to the anomalous Hall effect and the magnetisation of the material. The anomalous Nernst coefficient of (0.6$\pm$0.24) $\mu$V/K at 300 K is comparable to other perpendicular magnetic anisotropy thin films. Therefore $\tau$-MnAl is a promising candidate for spin-caloritronic research.