Large spin Hall angle and spin mixing conductance in highly resistive antiferromagnetic Mn2Au

TL;DR

This paper investigates the spin Hall effect in Mn2Au, an antiferromagnetic material, revealing a large spin Hall angle and high spin mixing conductance, which are promising for spintronic applications.

Contribution

It provides the first detailed measurements of spin pumping and inverse spin Hall effect in Mn2Au, demonstrating its potential in spintronics due to large spin Hall angle.

Findings

Large spin Hall angle of 0.22 in Mn2Au

High spin mixing conductance observed

Potential for spintronic device applications

Abstract

Antiferromagnetic (AFM) materials recently have shown interest in the research in spintronics due to its zero stray magnetic field, high anisotropy, and spin orbit coupling. In this context, the bi-metallic AFM Mn2Au has drawn attention because it exhibits unique properties and its Neel temperature is very high. Here, we report spin pumping and inverse spin Hall effect investigations in Mn2Au and CoFeB bilayer system using ferromagnetic resonance. We found large spin Hall angle {\theta}_SH = 0.22