Spin-filter tunneling detection of antiferromagnetic resonance with electrically-tunable damping

TL;DR

This paper demonstrates electrical detection and control of antiferromagnetic resonance in micrometer-scale van der Waals heterostructures, enabling advanced studies of high-frequency antiferromagnetic dynamics.

Contribution

It introduces a novel spin-filter tunneling technique for direct electrical detection of antiferromagnetic resonance in van der Waals heterostructures with tunable damping.

Findings

Efficient electrical detection of antiferromagnetic resonance in micrometer-scale devices.

Electrical control of resonance via spin-orbit torque from PtTe₂.

Potential for high-frequency antiferromagnetic spintronics applications.

Abstract

Antiferromagnetic spintronics offers the potential for higher-frequency operations and improved insensitivity to magnetic fields compared to ferromagnetic spintronics. However, previous electrical techniques to detect antiferromagnetic dynamics have utilized large, millimeter-scale bulk crystals. Here we demonstrate direct electrical detection of antiferromagnetic resonance in structures on the few-micrometer scale using spin-filter tunneling in PtTe$_2$/bilayer CrSBr/graphite junctions in which the tunnel barrier is the van der Waals antiferromagnet CrSBr. This sample geometry allows not only efficient detection, but also electrical control of the antiferromagnetic resonance through spin-orbit torque from the PtTe$_2$ electrode. The ability to efficiently detect and control antiferromagnetic resonance enables detailed studies of the physics governing these high frequency dynamics.