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.

arXiv commentComments are welcome

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Cited by in corpus (28)

• Magneto-Optical Detection of the Orbital Hall Effect in Chromium
• Spintronic Sources of Ultrashort Terahertz Electromagnetic Pulses
• Spin-orbit torque switching of magnetic tunnel junctions for memory application
• Switching of Perpendicular Magnetization by Spin-Orbit Torque
• Quantum materials for energy-efficient neuromorphic computing
• Current-induced deterministic switching of van der Waals ferromagnet at room temperature
• Giant bulk spin-orbit torque and efficient electrical switching in single ferrimagnetic FeTb layers with strong perpendicular magnetic anisotropy
• Strong variation of spin-orbit torques with relative spin relaxation rates in ferrimagnets
• Strong Spin-Orbit Torque Induced by the Intrinsic Spin Hall Effect in Cr1-xPtx
• Disentanglement of intrinsic and extrinsic side-jump scattering induced spin Hall effect in N-implanted Pt
• Quantifying Spin-Orbit Torques in Antiferromagnet/Heavy Metal Heterostructures
• Current-induced perpendicular effective magnetic field in magnetic heterostructures
• Boosting spin-orbit torque efficiency in spin-current generator/magnet/oxide superlattices
• 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
• Interface transparency to orbital current
• Effect of interfacial intermixing on spin-orbit torque in Co/Pt bilayers
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