Theory of spin Hall magnetoresistance (SMR) and related phenomena

Abstract

We review the recently discovered spin Hall magnetoresistance (SMR) and related effects from a theoretical point of view. The SMR is observed in bilayers of a magnetic insulator and a metal, in which spin currents aregenerated in the normal metal due to the spin Hall effect. The associated angular momentum transfer to the ferromagnetic layer and thereby the electrical resistance is modulated by the angle between the applied current and the magnetization direction. The SMR provides a convenient tool to non-invasively measure the magnetization direction and spin-transfer torque to an insulator. We introduce the minimal theoretical instruments to calculate the SMR, i.e. spin diffusion theory and quantum mechanical boundary conditions. This leads to a small set of parameters that can be fitted to experiments. We discuss the limitations of the theory as well as alternative mechanisms such as the ferromagnetic proximity effect and Rashba spin-orbit torques, and point out new developments related to the SMR.

Journal of Physics: Condensed Matter, Topical Review (in press)

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• Direct electronic measurement of the spin Hall effect
• Spin Seebeck insulator
• Long distance transport of magnon spin information in a magnetic insulator at room temperature
• Theory of spin Hall magnetoresistance
• Observation of the Spin-Seebeck Effect in a Ferromagnetic Semiconductor
• Theory of magnon-driven spin Seebeck effect
• Quantum transport theory of anomalous electric, thermoelectric, and thermal Hall effects in ferromagnets
• Unidirectional spin Hall magnetoresistance in ferromagnet/normal metal bilayers
• Spin pumping and spin-transfer torques in antiferromagnets
• Non-collinear Magnetoelectronics
• Spin Hall magnetoresistance in metallic bilayers
• Longitudinal Spin Seebeck Effect Free from the Proximity Nernst Effect
• Terahertz Antiferromagnetic Spin Hall Nano-Oscillator
• Temperature dependence of spin diffusion length and spin Hall angle in Au and Pt
• Scaling behavior of the spin pumping effect in ferromagnet/platinum bilayers
• Generation of coherent spin-wave modes in Yttrium Iron Garnet microdiscs by spin-orbit torque
• Giant room temperature interface spin Hall and inverse spin Hall effects
• Interface enhancement of Gilbert damping from first-principles
• Superfluid spin transport through antiferromagnetic insulators
• Magnon Mediated Electric Current Drag Across a Ferromagnetic Insulator Layer
• Hanle Magnetoresistance in Thin Metal Films with Strong Spin-Orbit Coupling
• Magnetoresistance due to edge spin accumulation
• Investigation of induced Pt magnetic polarization in Pt/Y3Fe5O12 bilayers
• Simultaneous detection of the spin-Hall magnetoresistance and the spin-Seebeck effect in Platinum and Tantalum on Yttrium Iron Garnet
• Anomalous Hall effect in YIG$|$Pt bilayers
• Magnetoresistance of heavy and light metal/ferromagnet bilayers
• Electrical detection of magnetization reversal without auxiliary magnets
• Interfacial Spin and Heat Transfer between Metals and Magnetic Insulators
• Angle-dependent magnetotransport in cubic and tetragonal ferromagnets: Application to (001)- and (113)A-oriented (Ga,Mn)As
• Spin-Hall magnetoresistance and spin Seebeck effect in spin-spiral and paramagnetic phases of multiferroic CoCr2O4 films
• Direct Method for Calculating Temperature-Dependent Transport Properties
• Current-induced spin torque resonance of magnetic insulators
• Nature of magnetotransport in metal/insulating-ferromagnet heterostructures: Spin Hall magnetoresistance or magnetic proximity effect
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• Anomalous Nernst and Hall effects in magnetized platinum and palladium
• Driving and detecting ferromagnetic resonance in insulators with the spin Hall effect
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• Anisotropic magnetoresistance driven by surface spin orbit scattering
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Cited by in corpus (38)

• Magnon spin transport driven by the magnon chemical potential in a magnetic insulator
• Tunable sign change of spin Hall magnetoresistance in Pt/NiO/YIG structures
• Probing Magnetism in Insulating Cr2Ge2Te6 by Induced Anomalous Hall Effect in Pt
• Spin Hall Magnetoresistance in a Canted Ferrimagnet
• Measurement of spin pumping voltage separated from extrinsic microwave effects
• The effect of inserted NiO layer on spin-Hall magnetoresistance in Pt/NiO/YIG heterostructures
• Spin Seebeck Effect: Sensitive Probe for Elementary Excitation, Spin Correlation, Transport, Magnetic Order, and Domains in Solids
• Anomalous spin Hall magnetoresistance in Pt/Co bilayers
• Orbital angular momentum of Bloch electrons: equilibrium formulation, magneto-electric phenomena, and the orbital Hall effect
• Interfacial contributions to spin-orbit torque and magnetoresistance in ferromagnet/heavy-metal bilayers
• Deficiency of the Bulk Spin Hall Effect Model for Spin-Orbit Torques in Magnetic Insulator/Heavy Metal Heterostructures
• Spin-Hall magnetoresistance in a low-dimensional magnetic insulator
• Microscopic Theory of the Spin Hall Magnetoresistance
• Impact of the magnetic proximity effect in Pt on the total magnetic moment of Pt/Co/Ta trilayers studied by x-ray resonant magnetic reflectivity
• Anomalous Hall-like transverse magnetoresistance in Au thin films on Y${}_3$Fe${}_5$O${}_{12}$
• Current direction anisotropy of the spin Hall magnetoresistance in nickel ferrite thin films with bulk-like magnetic properties
• Observation of magnetization surface textures of the van der Waals antiferromagnet FePS3 by spin Hall magnetoresistance
• All-electrical Magnon Transport Experiments in Magnetically Ordered Insulators
• Theory of spin-Hall magnetoresistance in the AC (terahertz) regime
• Magnetic coupling in Y${}_3$Fe${}_5$O${}_{12}$/Gd${}_3$Fe${}_5$O${}_{12}$ heterostructures
• Experimental evidence of spin-orbit torque from metallic interfaces
• Electrical detection of the spin reorientation transition in antiferromagnetic TmFeO${}_3$ thin films by spin Hall magnetoresistance
• Gate-Controlled Magnetoresistance of a Paramagnetic Insulator|Platinum Interface
• Spin mixing conductance and spin magnetoresistance of iridate/manganite interface
• Spin-Hall-Active Platinum Thin Films Grown Via Atomic Layer Deposition
• Spin Hall magnetoresistance in paramagnetic NdGaO3
• Anisotropic and controllable Gilbert-Bloch dissipation in spin valves
• Angle resolved relaxation of spin currents by antiferromagnets in spin valves
• Theory of Harmonic Hall Responses of Spin-Torque Driven Antiferromagnets
• Probing magnetic anisotropy and spin-reorientation transition in 3D antiferromagnet, Ho${}_{0.5}$Dy${}_{0.5}$FeO${}_3|$Pt using spin Hall magnetoresistance
• Inverse Ising effect and Ising magnetoresistance
• Spin-Hall magnetoresistance in quasi-two-dimensional antiferromagnetic insulator/metal bilayer systems
• Spin current transport in hybrid Pt / multifunctional magnetoelectric Ga0.6Fe1.4O3 bilayers
• Disentangling electrical switching of antiferromagnetic NiO using high magnetic fields
• Statistical characterization of the spin Hall magnetoresistance in YIG/Pt heterostructures
• Magnon-mediated electric current drag and nonlocal spin-Peltier effect in the ac regime
• Theory of nonlinear magnetoelectric transport effects in normal-metal $-$ magnetic-insulator heterostructures
• Gate-controlled proximity magnetoresistance in In1-xGaxAs/(Ga,Fe)Sb bilayer heterostructures