Strong Spin Hall Effect in the Antiferromagnet PtMn

Abstract

Effectively manipulating magnetism in ferromagnet (FM) thin film nanostructures with an in-plane current has become feasible since the determination of a 'giant' spin Hall effect (SHE) in certain heavy metal (HM)/FM system. Recently, both theoretical and experimental reports indicate that the non-collinear and collinear metallic antiferromagnet (AF) materials can have both a large anomalous Hall effect (AHE) and a strong SHE. Here we report a systematic study of the SHE in PtMn with several PtMn/FM systems. By using interface engineering to reduce the 'spin memory loss' we obtain a spin torque efficiency as large as 0.24. This is more than twice the previously reported spin torque efficiency for PtMn. We also find that the apparent spin diffusion length in PtMn is surprisingly long (about 2.3nm).

arXiv comment30 pages, 7 figures, 1 Table

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Cited by in corpus (31)

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• Current-induced spin-orbit torques in ferromagnetic and antiferromagnetic systems
• Roadmap of spin-orbit torques
• Effective spin-mixing conductance of heavy-metal-ferromagnet interfaces
• Spin Hall magnetoresistance in antiferromagnet/heavy-metal heterostructures
• On the origin of field-like spin-orbit torques in heavy metal-ferromagnet-oxide thin film heterostructures
• Fast, low-current spin-orbit torque switching of magnetic tunnel junctions through atomic modifications of the free layer interfaces
• 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
• Tunable Spin-Orbit Torques in Cu-Ta Binary Alloy Heterostructures
• Toward 100% Spin-Orbit Torque Efficiency with High Spin-Orbital Hall Conductivity Pt-Cr Alloys
• Inductive detection of field-like and damping-like AC inverse spin-orbit torques in ferromagnet/normal metal bilayers
• Boosting spintronics with superconductivity
• Field-free spin-orbit torque switching in Co/Pt/Co multilayer with mixed magnetic anisotropies
• Efficient Switching of 3-Terminal Magnetic Tunnel Junctions by the Giant Spin Hall Effect of ${\mathrm{Pt}}_{85}{\mathrm{Hf}}_{15}$ Alloy
• Magnetoelastic coupling enabled tunability of magnon spin current generation in 2D antiferromagnets
• The importance of the interface for picosecond spin pumping in antiferromagnet-heavy metal heterostructures
• All-electrical Magnon Transport Experiments in Magnetically Ordered Insulators
• Strong perpendicular magnetic anisotropy energy density at Fe alloy/HfO2 interfaces
• Spin Hall and Edelstein Effects in Novel Chiral Noncollinear Altermagnets
• Damping and Anti-Damping Phenomena in Metallic Antiferromagnets: An ab-initio Study
• Spin-orbit torque induced magnetisation dynamics and switching in CoFeB/Ta/CoFeB system with mixed magnetic anisotropy
• Spin-flop phase transition in the orthorhombic antiferromagnetic topological semimetal Cu0.95MnAs
• Spin-orbit Torque and Spin Hall Effect-based Cellular Level Therapeutic Neuromodulators: Modulating Neuron Activities through Spintronic Nanodevices
• Spin diffusion length associated to out-of-plane resistivity of Pt thin films in spin pumping experiments
• The Spin-Orbit Torque from a Magnetic Heterostructure with High-Entropy Alloy
• Suppression of Spin Pumping at Metal Interfaces
• Dynamic detection of current-induced spin-orbit magnetic fields: a phase independent approach
• Electrical Transport of perpendicularly magnetized L10-MnGa and MnAl films
• Spin-transport, spin-torque and memory in antiferromagnetic devices: Part of a collection of reviews on antiferromagnetic spintronics
• A comparison of two different mechanisms for deterministic spin orbit torque magnetization switching