Mechanism of Néel order switching in antiferromagnetic thin films revealed by magnetotransport and direct imaging
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We probe the current-induced magnetic switching of insulating antiferromagnet–heavy-metal systems, by electrical spin Hall magnetoresistance measurements and direct imaging, identifying a reversal occurring by domain wall (DW) motion. We observe switching of more than one-third of the antiferromagnetic domains by the application of current pulses. Our data reveal two different magnetic switching mechanisms leading together to an efficient switching, namely, the spin-current induced effective magnetic anisotropy variation and the action of the spin torque on the DWs.
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Physical review letters, 123, 17, APS, College Park, Md., 2019, https://doi.org/10.1103/PhysRevLett.123.177201