Spin Hall Magnetoresistance in a Canted Ferrimagnet

TL;DR

This paper investigates the spin Hall magnetoresistance in ferrimagnet/normal metal bilayers, revealing a sign change in magnetoresistance in canted phases and linking magnetic configurations to transport properties.

Contribution

It introduces a detailed analysis of magnetoresistance behavior in collinear versus canted ferrimagnetic phases, highlighting the role of sublattice orientations.

Findings

Conventional spin Hall magnetoresistance observed in collinear phase.

Sign reversal of magnetoresistance in canted phase.

Magnetic configurations explain transport differences.

Abstract

We study the spin Hall magnetoresistance effect in ferrimagnet/normal metal bilayers, comparing the response in collinear and canted magnetic phases. In the collinear magnetic phase, in which the sublattice magnetic moments are all aligned along the same axis, we observe the conventional spin Hall magnetoresistance. In contrast, in the canted phase, the magnetoresistance changes sign. Using atomistic spin model calculations of the magnetic configuration, we show that the electric transport for the different magnetic phases can be rationalized considering the individual sublattice moment orientations. This enables a magneto-transport based investigation of non-collinear magnetic textures.