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 PtTe2/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 PtTe2 electrode. The ability to efficiently detect and control antiferromagnetic resonance enables detailed studies of the physics governing these high frequency dynamics.
@article{arxiv.2407.09462,
title = {Spin-filter tunneling detection of antiferromagnetic resonance with electrically-tunable damping},
author = {Thow Min Jerald Cham and Daniel G. Chica and Xiaoxi Huang and Kenji Watanabe and Takashi Taniguchi and Xavier Roy and Yunqiu Kelly Luo and Daniel C. Ralph},
journal= {arXiv preprint arXiv:2407.09462},
year = {2025}
}