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We achieve current-induced switching in collinear insulatingantiferromagnetic CoO/Pt, with fourfold in-plane magnetic anisotropy. This ismeasured electrically by spin Hall magnetoresistance and confirmed by themagnetic field-induced spin-flop transition of the CoO layer. By applyingcurrent pulses and magnetic fields, we quantify the efficiency of the actingcurrent-induced torques and estimate a current-field equivalence ratio of$4x10^{-11} T A^{-1} m^2$. The N\'eel vector final state ($n \perp j$) is inline with a thermomagnetoelastic switching mechanism for a negativemagnetoelastic constant of the CoO.

Efficient spin torques in antiferromagnetic CoO/Pt quantified by comparing field- and current- induced switching