Detection of long-range orbital-Hall torques

Abstract

We report and quantify a large orbital-Hall torque generated by Nb and Ru, which we identify from a strong dependence of torques on the ferromagnets. This is manifested as a sign reversal and strong enhancement in the damping-like torques measured in Nb (or Ru)/Ni bilayers as compared to Nb (or Ru)/FeCoB bilayers. The long-range nature of orbital transport in the ferromagnet is revealed by the thickness dependences of Ni in Nb (or Ru)/Ni bilayers which are markedly different from the regular spin absorption in the ferromagnet that takes place within a few angstroms and thus it uniquely distinguishes the orbital Hall torque from the spin Hall torque.

References in corpus (33)

• New Perspectives for Rashba Spin-Orbit Coupling
• Spin Transfer Torques
• Wannier90 as a community code: new features and applications
• Spin Torque Ferromagnetic Resonance Induced by the Spin Hall Effect
• Current-induced spin-orbit torques in ferromagnetic and antiferromagnetic systems
• Spin transfer torque devices utilizing the giant spin Hall effect of tungsten
• Theory of spin Hall magnetoresistance
• Study of Intrinsic Spin Hall Effect and Orbital Hall Effect in 4d- and 5d- Transition Metals
• Dependence of the Efficiency of Spin Hall Torque on the Transparency of Pt-Ferromagnetic Layer Interfaces
• Intrinsic Spin and Orbital Hall Effects from Orbital Texture
• Tilted spin current generated by the collinear antiferromagnet RuO2
• Harnessing non-local orbital-to-spin conversion of interfacial orbital currents for efficient spin-orbit torques
• Gigantic intrinsic orbital Hall effects in weakly spin-orbit coupled metals
• Spin-orbit driven ferromagnetic resonance: A nanoscale magnetic characterisation technique
• Orbitronics: Orbital Currents in Solids
• Orbital Torque: Torque Generation by Orbital Current Injection
• Interface-generated spin currents
• Efficient conversion of orbital Hall current to spin current for spin-orbit torque switching
• Observation of long-range orbital transport and giant orbital torque
• Giant orbital Hall effect and orbital-to-spin conversion in 3d, 5d, and 4f metallic heterostructures
• Maximally Localized Wannier Functions within the FLAPW formalism
• Theory of Current-Induced Angular Momentum Transfer Dynamics in Spin-Orbit Coupled Systems
• Non-trivial charge-to-spin conversion in ferromagnetic metal/Cu/Al2O3 by orbital transport
• Orbital Rashba effect in surface oxidized Cu film
• Intrinsic orbital moment and prediction of a large orbital Hall effect in the 2D transition metal dichalcogenides
• Orbital Hall Insulating Phase in Transition Metal Dichalcogenide Monolayers
• Intrinsic spin-orbit torque arising from Berry curvature in metallic-magnet/Cu-oxide interface
• Orbital Hall effect in crystals: inter-atomic versus intra-atomic contributions
• Transverse and Longitudinal Spin-Torque Ferromagnetic Resonance for Improved Measurements of Spin-Orbit Torques
• Role of Dirac nodal lines and strain on the high spin Hall conductivity of epitaxial IrO2 thin films
• Sign reversal of field like spin-orbit torque in ultrathin Chromium/Nickel bilayer
• Interfacial and bulk spin Hall contributions to field-like spin-orbit torque generated by Iridium
• Origins of transverse voltages generated by applied thermal gradients and applied electric fields in ferrimagnetic-insulator/heavy-metal bilayers

Cited by in corpus (23)

• Time-domain observation of ballistic orbital-angular-momentum currents with giant relaxation length in tungsten
• Ultrafast THz probing of nonlocal orbital current in transverse multilayer metallic heterostructures
• Orbital angular momentum of Bloch electrons: equilibrium formulation, magneto-electric phenomena, and the orbital Hall effect
• Exploring orbital-charge conversion mediated by interfaces with copper through spin-orbital pumping
• Orbitronics in Two-dimensional Materials
• Orbital Hall effect in mesoscopic devices
• Symmetry constraints on the orbital transport in solids
• Spin and orbital Hall currents detected via current induced magneto-optical Kerr effect in V and Pt
• Orbital Hall Responses in Disordered Topological Materials
• Ultrathin films of black phosphorus as suitable platforms for unambiguous observation of the orbital Hall effect
• Controlling the orbital Hall effect in gapped bilayer graphene in the terahertz regime
• Evidence of Ultrashort Orbital Transport in Heavy Metals Revealed by Terahertz Emission Spectroscopy
• Intrinsic torque on the orbital angular momentum in an electric field
• Non-reciprocity in magnon mediated charge-spin-orbital current interconversion
• Light-induced Orbital and Spin Magnetism in $3d$, $4d$, and $5d$ Transition Metals
• Orbital currents in lattice multiorbital systems: Continuity equation, torques, and RKKY interaction
• Violation of local reciprocity in charge-orbital interconversion
• Orbital splitter effect and spatial resolution of current-induced orbital accumulation
• Evidence of orbital Hall current induced correlation in second harmonic response of longitudinal and transverse voltage in light metal-ferromagnet bilayers
• Theoretical study of orbital torque: Dependence on ferromagnet species and nonmagnetic layer thickness
• Giant orbital magnetoresistance in the antiferromagnet CoO driven by dynamic orbital angular momentum interaction
• Inductive detection of inverse spin-orbit torques in magnetic heterostructures
• Orbital Hall effect in spin-3/2 hole-doped semiconductors and its implications for orbitronics