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arXiv · 2507.10323

Chirality and polarization of inertial antiferromagnetic resonances driven by spin-orbit torques

Peng-Bin He·Ri-Xing Wang·Zai-Dong Li·Mikhail Cherkasskii
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Abstract

It is widely accepted that the handedness of a resonant mode is an intrinsic property. We show that, by tailoring the polarization and handedness of alternating spin-orbit torques used as the driving force, the polarization state and handedness of inertial resonant modes in an antiferromagnet (AFM) can be actively controlled. In contrast with ferromagnets, whose resonant-mode polarization is essentially fixed, AFM inertial modes can continuously evolve from elliptic through circular to linear polarization as the driving polarization is varied. We further identify an inertia-dependent critical degree of driving polarization at which the mode becomes linearly polarized while its handedness reverses.

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Peng-Bin He, Ri-Xing Wang, Zai-Dong Li, Mikhail Cherkasskii. 2025-07-14. Chirality and polarization of inertial antiferromagnetic resonances driven by spin-orbit torques. https://doi.org/10.1103/1cjr-7cgl

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