Room-Temperature Antiferromagnetic Resonance and Inverse Spin-Hall Voltage in Canted Antiferromagnets

I. Boventer, H. T. Simensen, A. Anane, M. Kläui, A. Brataas, and R. Lebrun
Phys. Rev. Lett. 126, 187201 – Published 6 May 2021
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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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  • Received 13 November 2020
  • Accepted 30 March 2021

DOI:https://doi.org/10.1103/PhysRevLett.126.187201

© 2021 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

I. Boventer1, H. T. Simensen2, A. Anane1, M. Kläui2,3,4, A. Brataas2, and R. Lebrun1,*

  • 1Unité Mixte de Physique, CNRS, Thales, Université Paris-Saclay, 91767, Palaiseau, France
  • 2Center for Quantum Spintronics, Department of Physics, Norwegian University of Science and Technology, Trondheim NO-7491, Norway
  • 3Institut für Physik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
  • 4Graduate School of Excellence Materials Science in Mainz (MAINZ), Staudingerweg 9, D-55128 Mainz, Germany

  • *Corresponding author romain.lebrun@cnrs-thales.fr

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Issue

Vol. 126, Iss. 18 — 7 May 2021

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