Negative spin Hall magnetoresistance in antiferromagnetic Cr2O3/Ta bilayer at low temperature region

Abstract

We investigate the observation of negative spin Hall magnetoresistance (SMR) in antiferromagnetic Cr2O3/Ta bilayers at low temperature. The sign of the SMR signals is changed from positive to negative monotonously from 300 K to 50 K. The change of the signs for SMR is related with the competitions between the surface ferromagnetism and bulky antiferromagnetic of Cr2O3. The surface magnetizations of Cr2O3 (0001) is considered to be dominated at higher temperature, while the bulky antiferromagnetics gets to be robust with decreasing of temperature. The slopes of the abnormal Hall curves coincide with the signs of SMR, confirming variational interface magnetism of Cr2O3 at different temperature. From the observed SMR ratio under 3 T, the spin mixing conductance at Cr2O3/Ta interface is estimated to be 1.12*10^14 (ohm^-1*m^-2), which is comparable to that of YIG/Pt structures and our early results of Cr2O3/W. (Appl. Phys. Lett. 110, 262401 (2017))

References in corpus (17)

• Spin torque switching with the giant spin Hall effect of tantalum
• Antiferromagnetic spintronics
• Spin Hall Magnetoresistance Induced by a Non-Equilibrium Proximity Effect
• Theory of spin Hall magnetoresistance
• Robust isothermal electric switching of interface magnetization: A route to voltage-controlled spintronics
• Comparative Measurements of Inverse Spin Hall and Magnetoresistance in YIG|Pt and YIG|Ta
• Quantitative study of the spin Hall magnetoresistance in ferromagnetic insulator/normal metal hybrids
• Unidirectional spin Hall magnetoresistance in ferromagnet/normal metal bilayers
• Indication of intrinsic spin Hall effect in 4d and 5d transition metals
• Purely Antiferromagnetic Magnetoelectric Random Access Memory
• Spin-Hall Magnetoresistance in Platinum on Yttrium Iron Garnet: Dependence on platinum thickness and in-plane/out-of-plane magnetization
• Spin Hall magnetoresistance in antiferromagnet/heavy-metal heterostructures
• Negative spin Hall magnetoresistance of Pt on the bulk easy-plane antiferromagnet NiO
• Equilibrium magnetization at the boundary of a magnetoelectric antiferromagnet
• Spin Hall magnetoresistance at Pt/CoFe2O4 interfaces and texture effects
• Exchange magnetic field torques in YIG/Pt bilayers observed by the spin-Hall magnetoresistance
• Spin Hall magnetoresistance in antiferromagnet/normal metal bilayers

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