Mechanism of N el order switching in antiferromagnetic thin films revealed by magnetotransport and direct imaging

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 DW