Lack of simple correlation between switching current density and spin-orbit torque efficiency of perpendicularly magnetized spin-current generator/ferromagnet heterostructures

Abstract

Spin-orbit torque can drive electrical switching of magnetic layers. Here, we report that at least for micrometer-sized samples there is no simple correlation between the efficiency of dampinglike spin-orbit torque (ξ_DL^j) and the critical switching current density of perpendicularly magnetized spin-current generator/ferromagnet heterostructures. We find that the values of ξ_DL^j based on switching current densities can either under- or over-estimated ξ_DL^j by up to tens of times in a domain-wall depinning analysis, while in the macrospin analysis based on the switching current density ξ_DL^j can be overestimated by up to thousands of times. When comparing the relative strengths of ξ_DL^j of spin-current generators, the critical switching current densities by themselves are a poor predictor.

arXiv commentSubmitted to Phys. Rev. Appl

References in corpus (37)

• Spin Torque Ferromagnetic Resonance Induced by the Spin Hall Effect
• Spin Transfer Torque Generated by the Topological Insulator Bi_2Se_3
• Symmetry and magnitude of spin-orbit torques in ferromagnetic heterostructures
• Dynamics of Dzyaloshinskii domain walls in ultrathin magnetic films
• Quantitative characterization of the spin orbit torque using harmonic Hall voltage measurements
• Domain wall motion governed by the spin Hall effect
• Dependence of the Efficiency of Spin Hall Torque on the Transparency of Pt-Ferromagnetic Layer Interfaces
• Ultrafast magnetization switching by spin-orbit torques
• Room-temperature perpendicular magnetization switching through giant spin-orbit torque from sputtered BixSe(1-x) topological insulator material
• Interplay of spin-orbit torque and thermoelectric effects in ferromagnet/normal metal bilayers
• Determination of the Spin-Hall-Effect-Induced and the Wedged-Structure-Induced Spin Torque Efficiencies in Heterostructures with Perpendicular Magnetic Anisotropy
• Interface control of the magnetic chirality in CoFeB|MgO heterosctructures with heavy metal underlayers
• Spin-orbit-torque magnetization switching of a three terminal perpendicular magnetic tunnel junction
• Threshold current for switching of a perpendicular magnetic layer induced by spin Hall effect
• Central role of domain wall depinning for perpendicular magnetization switching driven by spin torque from the spin Hall effect
• Time- and spatially-resolved magnetization dynamics driven by spin-orbit torques
• Enhancement of Thermally Injected Spin Current through an Antiferromagnetic Insulator
• Single-shot dynamics of spin-orbit torque and spin transfer torque switching in three-terminal magnetic tunnel junctions
• Highly efficient spin current generation by the spin Hall effect in Au${}_{1-x}$Pt${}_x$
• Ultra-fast perpendicular Spin Orbit Torque MRAM
• 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
• Spin Hall Switching of the Magnetization in Ta/TbFeCo Structures with Bulk Perpendicular Anisotropy
• The spin Hall effect of Bi-Sb alloys driven by thermally excited Dirac-like electrons
• Fast, low-current spin-orbit torque switching of magnetic tunnel junctions through atomic modifications of the free layer interfaces
• Enhancing spin-orbit torque by strong interfacial scattering from ultra-thin insertion layers
• Maximizing the spin-orbit torque efficiency of Pt/Ti multilayers by optimization of the tradeoff between the intrinsic spin Hall conductivity and carrier lifetime
• Observation of strong bulk damping-like spin-orbit torque in chemically disordered ferromagnetic single layers
• 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
• Tunable Spin-Orbit Torques in Cu-Ta Binary Alloy Heterostructures
• Origin of Strong Two-Magnon Scattering in Heavy Metal/Ferromagnet/Oxide Heterostructures
• 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

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