Interlayer exchange coupling through Ir-doped Cu spin Hall material

Abstract

Metallic superlattices where the magnetization vectors in the adjacent ferromagnetic layers are antiferromagnetically coupled by the interlayer exchange coupling through nonmagnetic spacer layers are systems available for the systematic study on antiferromagnetic (AF) spintronics. As a candidate of nonmagnetic spacer layer material exhibiting remarkable spin Hall effect, which is essential to achieve spin-orbit torque switching, we selected the Ir-doped Cu in this study. The AF-coupling for the Co / Cu${}_{95}$Ir${}_5$ / Co was investigated, and was compared with those for the Co / Cu / Co and Co / Ir / Co. The maximum magnitude of AF-coupling strength was obtained to be 0.39 mJ/m${}^2$ at the Cu${}_{95}$Ir${}_5$ thickness of about 0.75 nm. Furthermore, we found a large spin Hall angle of Cu${}_{95}$Ir${}_5$ in Co / Cu${}_{95}$Ir${}_5$ bilayers by carrying out spin Hall magnetoresistance and harmonic Hall voltage measurements, which are estimated to be 3 ~ 4 %. Our experimental results clearly indicate that Cu${}_{95}$Ir${}_5$ is a nonmagnetic spacer layer allowing us to achieve moderately strong AF-coupling and to generate appreciable spin-orbit torque via the spin Hall effect.

arXiv comment28 pages, 7 figures

References in corpus (38)

• Spin torque switching with the giant spin Hall effect of tantalum
• Antiferromagnetic spintronics
• Antiferromagnetic spintronics
• Electrical switching of an antiferromagnet
• Spin transfer torque devices utilizing the giant spin Hall effect of tungsten
• Spin Hall Magnetoresistance Induced by a Non-Equilibrium Proximity Effect
• Theory of spin Hall magnetoresistance
• Anatomy of Spin-Transfer Torque
• Spin Pumping and Inverse Spin Hall Effect in Platinum: The Essential Role of Spin-Memory Loss at Metallic Interfaces
• Comparative Measurements of Inverse Spin Hall and Magnetoresistance in YIG|Pt and YIG|Ta
• Spin-orbit torques induced by interface-generated spin currents
• Finite-element theory of transport in ferromagnet-normal metal systems
• Spin torque study of the spin Hall conductivity and spin diffusion length in platinum thin films with varying resistivity
• Interplay of spin-orbit torque and thermoelectric effects in ferromagnet/normal metal bilayers
• Writing and Reading antiferromagnetic Mn${}_2$Au: Néel spin-orbit torques and large anisotropic magnetoresistance
• Saturation of electrical resistivity
• Quantum transport theory of anomalous electric, thermoelectric, and thermal Hall effects in ferromagnets
• Spin Hall magnetoresistance in metallic bilayers
• Antidamping torque-induced switching in biaxial antiferromagnetic insulators
• Experimental test of the spin mixing interface conductivity concept
• Tuning the spin Hall effect of Pt from the moderately dirty to the superclean regime
• Extrinsic Spin Hall Effect Induced by Iridium Impurities in Copper
• Giant room temperature interface spin Hall and inverse spin Hall effects
• Imaging current-induced switching of antiferromagnetic domains in CuMnAs
• Effective spin-mixing conductance of heavy-metal-ferromagnet interfaces
• Spin-orbit torques in heavy metal/ferromagnet bilayers with varying strength of interfacial spin-orbit coupling
• Electrical switching of antiferromagnetic Mn${}_2$Au and the role of thermal activation
• Spin transfer in an antiferromagnet
• Current-induced torques and interfacial spin-orbit coupling
• Anomalous temperature dependence of current induced torques in CoFeB|MgO heterostructures with Ta based underlayers
• Direct imaging of antiferromagnetic domains in Mn${}_2$Au manipulated by high magnetic fields
• Large Spin Anomalous Hall Effect in L1${}_0$-FePt: Symmetry and Magnetization Switching
• Spin diffusion length and polarization of ferromagnetic metals measured by spin-absorption technique in lateral spin valves
• Dzyaloshinskii-Moriya interaction and spin-orbit torque at the Ir/Co interface
• Complex THz and DC inverse spin Hall effect in YIG/Cu${}_{1-x}$Ir${}_x$ bilayers across a wide concentration range
• Anomalous spin Hall magnetoresistance in Pt/Co bilayers
• Giant perpendicular magnetic anisotropy in Ir/Co/Pt multilayers
• Spin-Hall and Anisotropic Magnetoresistance in Ferrimagnetic Co-Gd / Pt layers

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