# Anomalous current-induced spin torques in ferrimagnets near compensation

## TL;DR

This paper demonstrates that ferrimagnets near their compensation point exhibit significantly enhanced spin-orbit torques due to negative exchange interaction, offering promising avenues for spintronic applications.

## Contribution

It reveals the substantial enhancement of spin-orbit torques in ferrimagnets near compensation, supported by macrospin modeling and experimental data.

## Key findings

- Spin-orbit torques are 9 times larger near compensation point.
- Effective field and switching efficiency increase substantially.
- Ferrimagnets near compensation are promising for spintronic devices.

## Abstract

While current-induced spin-orbit torques (SOTs) have been extensively studied in ferromagnets and antiferromagnets, ferrimagnets have been less studied. Here we report the presence of enhanced spin-orbit torques resulting from negative exchange interaction in ferrimagnets. The effective field and switching efficiency increase substantially as CoGd approaches its compensation point, giving rise to 9 times larger spin-orbit torques compared to that of non-compensated one. The macrospin modelling results also support efficient spin-orbit torques in a ferrimagnet. Our results suggest that ferrimagnets near compensation can be a new route for spin-orbit torque applications due to their high thermal stability and easy current-induced switching assisted by negative exchange interaction.

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Source: https://tomesphere.com/paper/1703.08263