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arXiv · 2103.16872

Room temperature antiferromagnetic resonance and inverse spin-Hall voltage in canted antiferromagnets

I. Boventer·H. T. Simensen·A. Anane·M. Kläui·A. Brataas·R. Lebrun
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Abstract

We study theoretically and experimentally the spin pumping signals induced by the resonance of canted antiferromagnets with Dzyaloshinskii-Moriya interaction and demonstrate that they can generate easily observable inverse spin-Hall voltages. Using a bilayer of hematite/heavy metal as a model system, we measure at room temperature the antiferromagnetic resonance and an associated inverse spin-Hall voltage, as large as in collinear antiferromagnets. As expected for coherent spin-pumping, we observe that the sign of the inverse spin-Hall voltage provides direct information about the mode handedness as deduced by comparing hematite, chromium oxide and the ferrimagnet Yttrium-Iron Garnet. Our results open new means to generate and detect spin-currents at terahertz frequencies by functionalizing antiferromagnets with low damping and canted moments.

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I. Boventer, H. T. Simensen, A. Anane, M. Kläui, A. Brataas, R. Lebrun. 2021-03-31. Room temperature antiferromagnetic resonance and inverse spin-Hall voltage in canted antiferromagnets. https://doi.org/10.1103/physrevlett.126.187201

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