Abstract
Temperature dependence of the spin Hall magnetoresistance (SMR) has been investigated herein Pt/Cr2O3/Y3Fe5O12 structure. Well below the Néel temperature of Cr2O3, the SMR is not observed at the noise level of 1.2 ppm. In vicinity of the Néel temperature, only a positive SMR tracks the YIG magnetic switching process, supporting that the SMR of normal metal/antiferromagnetic insulator/ferromagnetic insulator trilayer is controlled by the Néel vector of the antiferromagnetic insulator. A high field magnetoresistance is observed up to an external magnetic field of 20000 Oe which has a field angle dependence symmetry consistent with the SMR. We attribute this high field magnetoresistance to be induced by the Hanle magnetoresistance in Pt.
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