Recently, canted antiferromagnets offer great potential for fundamental research and applications due to their unique properties. The presence of the Dzyaloshinskii-Moriya interaction leads to the existence of a weak ferromagnetic moment at room temperature. We study both theoretically and experimentally microwave spin pumping by the quasi-ferromagnetic mode from a canted easy plane antiferromagnet with weak ferromagnetism FeBO3. The conversion of a microwave signal into the constant voltage is realized using the inverse spin Hall effect in an iron borate/heavy metal heterostructure. We use an additional bias magnetic field to selectively tune the resonance frequency of such a microwave detector over a wide range up to 43.5 GHz with potential sensitivity near 2.5 microV/W. We confirm the pure spin current nature by changing polarity of the detected via inverse spin Hall effect voltage by switching the direction of the bias magnetic field. We believe that our results will be useful for the development of highly tunable, portable and sensitive microwave antiferromagnet-based functional devices.
@article{arxiv.2310.20422,
title = {Microwave Spin-Pumping from an Antiferromagnet FeBO3},
author = {David Gabrielyan and Dmitry Volkov and Elizabeth Kozlova and Ansar Safin and Dmitry Kalyabin and Alexey Klimov and Vladimir Preobrazhensky and Mark Strugatsky and Sergey Yagupov and Ivan Moskal and Gennady Ovsyannikov and Sergey Nikitov},
journal= {arXiv preprint arXiv:2310.20422},
year = {2023}
}
Comments
7 pages, 3 figures, 3 pages supplementary information