On the origin of field-like spin-orbit torques in heavy metal-ferromagnet-oxide thin film heterostructures

Abstract

We report measurements of the thickness and temperature (T) dependencies of current-induced spin-orbit torques, especially the field-like (FL) component, in various heavy metal (HM)/normal metal (NM) spacer/ferromagnet (FM)/Oxide (MgO and HfOx/MgO) heterostructures. The FL torque in these samples originates from spin current generated by the spin Hall effect (SHE) in the HM. For a FM layer sufficiently thin that a substantial portion of this spin current can reach the FM/Oxide interface, T-dependent spin scattering there can yield a strong FL torque that is, in some cases, opposite in sign to that exerted at the NM/FM interface.

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Cited by in corpus (44)

• Spin-orbit torques in heavy metal/ferromagnet bilayers with varying strength of interfacial spin-orbit coupling
• Maximizing Spin-Orbit Torque Generated by the Spin Hall Effect of Pt
• The spin Hall effect of Bi-Sb alloys driven by thermally excited Dirac-like electrons
• Role of dimensional crossover on spin-orbit torque efficiency in magnetic insulator thin films
• Fast, low-current spin-orbit torque switching of magnetic tunnel junctions through atomic modifications of the free layer interfaces
• Fully Spin-transparent magnetic interfaces enabled by insertion of a paramagnetic NiO layer
• Reorientable Spin Direction for Spin Current Produced by the Anomalous Hall Effect
• Enhancing spin-orbit torque by strong interfacial scattering from ultra-thin insertion layers
• Exceptionally high, strongly temperature dependent, spin Hall conductivity of SrRuO3
• Strong enhancement of the spin Hall effect by spin fluctuations near the Curie point of FexPt1-x alloys
• Enhancement of spin transparency by interfacial alloying
• Energy-efficient ultrafast SOT-MRAMs based on low-resistivity spin Hall metal Au0.25Pt0.75
• Strong variation of spin-orbit torques with relative spin relaxation rates in ferrimagnets
• Spin-orbit torque characterization in a nutshell
• Unveiling the mechanism of bulk spin-orbit torques within chemically disordered Fe${}_x$Pt${}_{1-x}$ single layers
• Field-free spin-orbit-torque switching of perpendicular magnetization aided by uniaxial shape anisotropy
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• Deterministic Field-free Switching of a Perpendicularly Magnetized Ferromagnetic Layer via the Joint Effects of Dzyaloshinskii-Moriya Interaction and Field-like Spin-orbit Torque: An Appraisal
• Spin-orbit torque generation in NiFe/IrO2 bilayers
• Spin and charge interconversion in Dirac semimetal thin films
• Strong Spin-Orbit Torque Induced by the Intrinsic Spin Hall Effect in Cr1-xPtx
• Interfacial and bulk spin Hall contributions to field-like spin-orbit torque generated by Iridium
• Spin Hall effect in a spin-1 chiral semimetal
• Enhanced spin-orbit torques in MnAl/Ta films with improving chemical ordering
• Spin-Splitting Magnetoresistance in Altermagnetic RuO2 Thin Films
• Tailoring the switching efficiency of magnetic tunnel junctions by the fieldlike spin-orbit torque
• Boosting spin-orbit torque efficiency in spin-current generator/magnet/oxide superlattices
• Strong perpendicular magnetic anisotropy energy density at Fe alloy/HfO2 interfaces
• Macro-spin Modeling and Experimental Study of Spin-orbit Torque Biased Magnetic Sensors
• Spin Hall magnetoresistance sensor using Au${}_x$Pt${}_{1-x}$ as the spin-orbit torque biasing layer
• Spin-orbit-torque driven magnetoimpedance in Pt-layer/magnetic-ribbon heterostructures
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• Study of magnetism in MgO/FeCoB/MgO trilayers using x-ray standing wave techniques
• Understanding current-driven dynamics of magnetic Néel walls in heavy metal/ferromagnetic metal/oxide trilayers
• Spin Hall conductivity in Bi${}_{1-x}$Sb${}_x$ as an experimental test of bulk-boundary correspondence
• Effect of magnons on the temperature dependence and anisotropy of spin-orbit torque
• Dynamic detection of current-induced spin-orbit magnetic fields: a phase independent approach
• Anatomy of Type-X Spin-Orbit Torque Switching
• Strong, Temperature-Dependent Spin-Orbit Torques in Heavy Fermion YbAl${}_3$
• Influences of interfacial oxidization on surface magnetic energy, magnetic damping and spin-orbit-torques in Pt / ferromagnet / capping structures