Role of an additional interfacial spin-transfer torque for current-driven skyrmion dynamics in chiral magnetic layers
arXiv:2009.03751 · doi:10.1103/PhysRevB.102.214408
Abstract
Skyrmions can be driven by spin-orbit torques as a result of the spin Hall effect. Here we model an additional contribution in ultra-thin multilayers, arising from the spin accumulation at heavy metal / ferromagnetic interfaces and observe the effects on a large range of skyrmion diameters. The combination of the interfacial spin-transfer torque and the spin-orbit torque results in skyrmion motion which helps to explain the observation of small skyrmion Hall angles for skyrmion diameters less than 100 nm. We show that this additional term has a significant effect on the skyrmion dynamics and leads to rapidly decreasing skyrmion Hall angles for small skyrmion diameters, as well as a skyrmion Hall angle versus skyrmion velocity dependence nearly independent of the surface roughness characteristics. Also, the effect of various disordered energy landscapes, in the form of surface roughness, on the skyrmion Hall angle and velocity is shown to be largely drive-dependent. Our results show good agreement with those found in experiments thus concluding that the interfacial spin-transfer torque should be included in micromagnetics simulations for the reproduction of experimental results.
arXiv comment28 pages, 9 figures, 1 table
References in corpus (47)
- Spin torque switching with the giant spin Hall effect of tantalum
- Advances in the Physics of Magnetic Skyrmions and Perspective for Technology
- Magnetic switching by spin torque from the spin Hall effect
- Current-driven dynamics of chiral ferromagnetic domain walls
- Observation of room temperature magnetic skyrmions and their current-driven dynamics in ultrathin Co films
- Spin transfer torque devices utilizing the giant spin Hall effect of tungsten
- Roles of non-equilibrium conduction electrons on magnetization dynamics of ferromagnets
- Direct Observation of the Skyrmion Hall Effect
- Skyrmions at room temperature : From magnetic thin films to magnetic multilayers
- Additive interfacial chiral interaction in multilayers for stabilization of small individual skyrmion at room temperature
- Skyrmion Hall Effect Revealed by Direct Time-Resolved X-Ray Microscopy
- Tunable Room Temperature Magnetic Skyrmions in Ir/Fe/Co/Pt Multilayers
- Anatomy of Dzyaloshinskii-Moriya Interaction at Co/Pt Interfaces
- Creep and flow regimes of magnetic domain wall motion in ultrathin Pt/Co/Pt films with perpendicular anisotropy
- Spin-Diffusion Lengths in Metals and Alloys, and Spin-Flipping at Metal/Metal Interfaces: an Experimentalist's Critical Review
- Mechanisms of spin-polarized current-driven magnetization switching
- Role of transparency of platinum-ferromagnet interface in determining intrinsic magnitude of spin Hall effect
- Domain wall motion governed by the spin Hall effect
- Skyrmions in Magnetic Multilayers
- Finite-element theory of transport in ferromagnet-normal metal systems
- Current-driven dynamics and inhibition of the skyrmion Hall effect of ferrimagnetic skyrmions in GdFeCo films
- Room-temperature current-induced generation and motion of sub-100nm skyrmions
- Current-induced skyrmion generation and dynamics in symmetric bilayers
- Electrical signature of individual magnetic skyrmions in multilayered systems
- Domain wall dynamics driven by adiabatic spin transfer torques
- Controlling Dzyaloshinskii-Moriya Interaction via Chirality Dependent Layer Stacking, Insulator Capping and Electric Field
- Capturing of a Magnetic Skyrmion with a Hole
- Current-Driven Skyrmion Dynamics and Drive-Dependent Skyrmion Hall Effect in an Ultrathin Film
- Current induced rotational torques in the skyrmion lattice phase of chiral magnets
- Current-driven skyrmion dynamics in disordered films
- Diameter-independent skyrmion Hall angle in the plastic flow regime observed in chiral magnetic multilayers
- Drive Dependence of the Skyrmion Hall Effect in Disordered Systems
- Quantized Transport for a Skyrmion Moving on a Two-Dimensional Periodic Substrate
- Theory of Topological Spin Hall Effect in Antiferromagnetic Skyrmion: Impact on Current-induced Motion
- Ferromagnetic resonance study of sputtered Co|Ni multilayers
- A unified drift-diffusion theory for transverse spin currents in spin valves, domain walls and other textured magnets
- Fluctuations and Noise Signatures of Driven Magnetic Skyrmions
- Magnetization damping in polycrystalline Co ultra-thin films: Evidence for non-local effects
- Thermal Creep and the Skyrmion Hall Angle in Driven Skyrmion Crystals
- Enhanced Non-Adiabaticity in Vortex Cores due to the Emergent Hall Effect
- Drastic emergence of huge negative spin-transfer torque in atomically thin Co layers
- Experimental Evidence of Non-Negligible Imaginary Part of Spin Mixing Conductance and Its Impact on Magnetization Dynamics in Heavy-Metal|Ferromagnet Bilayers
- Tuning skyrmion Hall effect via engineering of spin-orbit interaction
- Intrinsic non-adiabatic topological torque in magnetic skyrmions and vortices
- Spin transparency for an interface of an ultrathin magnet within the spin dephasing length
- Steering of the Skyrmion Hall Angle By Gate Voltage
- Modeling Hall viscosity in magnetic-skyrmion systems
Cited by in corpus (4)
- Statics and Dynamics of Skyrmions Interacting with Pinning: A Review
- Boris Computational Spintronics -- High Performance Multi-Mesh Magnetic and Spin Transport Modelling Software
- Speeding up explicit numerical evaluation methods for micromagnetic simulations using demagnetizing field polynomial extrapolation
- Self-Consistent Computation of Spin Torques and Magneto-Resistance in Tunnel Junctions and Magnetic Read-Heads with Metallic Pinhole Defects