Maximizing Spin-Orbit Torque Generated by the Spin Hall Effect of Pt

Abstract

Efficient generation of spin-orbit torques (SOTs) is central for the exciting field of spin-orbitronics. Platinum, the archetypal spin Hall material, has the potential to be an outstanding provider for spin-orbit torques due to its giant spin Hall conductivity, low resistivity, high stabilities, and the ability to be compatible with CMOS circuits. However, pure clean-limit Pt with low resistivity still provides a low damping-like spin-orbit torque efficiency, which limits its practical applications. The efficiency of spin-orbit torque in Pt-based magnetic heterostructures can be improved considerably by increasing the spin Hall ratio of Pt and spin transmissivity of the interfaces. Here we reviews recent advances in understanding the physics of spin current generation, interfacial spin transport, and the metrology of spin-orbit torques, and summarize progress towards the goal of Pt-based spin-orbit torque memories and logic that are fast, efficient, reliable, scalable, and non-volatile.

Comments are welcome

References in corpus (35)

• Direct electronic measurement of the spin Hall effect
• Theory of spin Hall magnetoresistance
• Study of Intrinsic Spin Hall Effect and Orbital Hall Effect in 4d- and 5d- Transition Metals
• Single-shot dynamics of spin-orbit torque and spin transfer torque switching in three-terminal magnetic tunnel junctions
• Scaling behavior of the spin pumping effect in ferromagnet/platinum bilayers
• Interface enhancement of Gilbert damping from first-principles
• Spin-orbit torque-driven skyrmion dynamics revealed by time-resolved X-ray microscopy
• Spin-orbit torques in heavy metal/ferromagnet bilayers with varying strength of interfacial spin-orbit coupling
• Strong damping-like spin-orbit torque and tunable Dzyaloshinskii-Moriya interaction generated by low-resistivity Pd${}_{1-x}$Pt${}_x$ alloys
• Nanosecond-timescale low error switching of in-plane magnetic tunnel junctions through dynamic Oersted-field assisted spin-Hall effect
• Enhancement of the Anti-Damping Spin Torque Efficacy of Platinum by Interface Modification
• On the origin of field-like spin-orbit torques in heavy metal-ferromagnet-oxide thin film heterostructures
• Demonstration of nanosecond operation in stochastic magnetic tunnel junctions
• Spin Hall Switching of the Magnetization in Ta/TbFeCo Structures with Bulk Perpendicular Anisotropy
• Fully Spin-transparent magnetic interfaces enabled by insertion of a paramagnetic NiO layer
• Measurement of spin pumping voltage separated from extrinsic microwave effects
• Spin-orbit torques from interfacial spin-orbit coupling for various interfaces
• Spin-memory loss due to spin-orbit coupling at ferromagnet/heavy-metal interfaces: Ab initio spin-density matrix approach
• Enhancing spin-orbit torque by strong interfacial scattering from ultra-thin insertion layers
• Thermal Stability and Anisotropic Sublimation of Two-Dimensional Colloidal Bi2Te3 and Bi2Se3 Nanocrystals
• Ultrafast spin-currents and charge conversion at 3d-5d interfaces probed by time-domain terahertz spectroscopy
• Observation of strong bulk damping-like spin-orbit torque in chemically disordered ferromagnetic single layers
• Benchmarking of spin-orbit torque switching efficiency in Pt alloys
• Transverse and Longitudinal Spin-Torque Ferromagnetic Resonance for Improved Measurements of Spin-Orbit Torques
• Enhancement of spin transparency by interfacial alloying
• Energy-efficient ultrafast SOT-MRAMs based on low-resistivity spin Hall metal Au0.25Pt0.75
• Size-dependence of nanosecond-scale spin-torque switching in perpendicularly magnetized tunnel junctions
• Lack of simple correlation between switching current density and spin-orbit torque efficiency of perpendicularly magnetized spin-current generator/ferromagnet heterostructures
• Ballistic spin transport in the presence of interfaces with strong spin-orbit coupling
• Efficient Spin-Orbit Torque Switching with Non-Epitaxial Chalcogenide Heterostructures
• Unveiling the mechanism of bulk spin-orbit torques within chemically disordered Fe${}_x$Pt${}_{1-x}$ single layers
• Suppression of the fieldlike spin-orbit torque efficiency due to the magnetic proximity effect in ferromagnet/platinum bilayers
• Boundary conditions for spin and charge diffusion in the presence of interfacial spin-orbit coupling
• Spin transparency for an interface of an ultrathin magnet within the spin dephasing length
• Charge-to-spin conversion efficiency in ferromagnetic nanowires by spin torque ferromagnetic resonance: Reconciling lineshape and linewidth analysis methods

Cited by in corpus (6)

• Spintronic Sources of Ultrashort Terahertz Electromagnetic Pulses
• Spin-orbit torque switching of magnetic tunnel junctions for memory application
• Strong Spin-Orbit Torque Induced by the Intrinsic Spin Hall Effect in Cr1-xPtx
• Current-induced perpendicular effective magnetic field in magnetic heterostructures
• A Perspective on Electrical Generation of Spin Current for Magnetic Random Access Memories
• Calculating the spin memory loss at Cu$|$metal interfaces from first principles