Spin-transfer torque-driven motion, deformation, and instabilities of magnetic skyrmions at high currents
arXiv:2004.00450 · doi:10.1103/PhysRevB.101.214428
Abstract
In chiral magnets, localized topological magnetic whirls, magnetic skyrmions, can be moved by spin polarized electric currents. Upon increasing the current strength, with prospects for high-speed skyrmion motion for spintronics applications in mind, isolated skyrmions deform away from their typical circular shape. We analyze the influence of spin-transfer torques on the shape of a single skyrmion, including its stability upon adiabatically increasing the strength of the applied electric current. For rather compact skyrmions at uniaxial anisotropies well above the critical anisotropy for domain wall formation, we find for high current densities that the skyrmion assumes a non-circular shape with a tail, reminiscent of a shooting star. For larger and hence softer skyrmions close to the critical anisotropy, in turn, we observe a critical current density above which skyrmions become unstable. We show that above a second critical current density the shooting star solution can be recovered also for these skyrmions.
arXiv comment13 pages, 11 figures
References in corpus (52)
- Skyrmion Lattice in a Chiral Magnet
- Observation of room temperature magnetic skyrmions and their current-driven dynamics in ultrathin Co films
- Current-induced spin-orbit torques in ferromagnetic and antiferromagnetic systems
- Roles of non-equilibrium conduction electrons on magnetization dynamics of ferromagnets
- Spin Transfer Torques in MnSi at Ultra-low Current Densities
- Direct Observation of the Skyrmion Hall Effect
- Micromagnetic understanding of current-driven domain wall motion in patterned nanowires
- Room temperature chiral magnetic skyrmion in ultrathin magnetic nanostructures
- Emergent electrodynamics of skyrmions in a chiral magnet
- Skyrmion confinement in ultrathin film nanostructures in the presence of Dzyaloshinskii-Moriya interaction
- Theory of Current-Driven Domain Wall Motion: A Poorman's Approach
- Current-induced skyrmion dynamics in constricted geometries
- Skyrmion Hall Effect Revealed by Direct Time-Resolved X-Ray Microscopy
- Theory of current-driven motion of Skyrmions and spirals in helical magnets
- Static and Dynamical Properties of Antiferromagnetic Skyrmions in the Presence of Applied Current and Temperature
- Multiply periodic states and isolated skyrmions in an anisotropic frustrated magnet
- Magnetic bilayer-skyrmions without skyrmion Hall effect
- Field-Dependent Size and Shape of Single Magnetic Skyrmions
- Modification of the Landau-Lifshitz Equation in the Presence of a Spin-Polarized Current in CMR and GMR Materials
- Antiferromagnetic Skyrmion: Stability, Creation and Manipulation
- The properties of isolated chiral skyrmions in thin magnetic films
- Domain wall mobility, stability and Walker breakdown in magnetic nanowires
- Magnon-skyrmion scattering in chiral magnets
- Collective spin excitations of helices and magnetic skyrmions: review and perspectives of magnonics in non-centrosymmetric magnets
- Magnetic structures and reorientation transitions in noncentrosymmetric uniaxial antiferromagnets
- Rotating skyrmion lattices by spin torques and field or temperature gradients
- Inertia, diffusion and dynamics of a driven skyrmion
- Compact Skyrmions, Merons and Bimerons in Thin Chiral Magnetic Films
- Capturing of a Magnetic Skyrmion with a Hole
- Breathing modes of confined skyrmions in ultrathin magnetic dots
- Magnetic Skyrmions on a Two-Lane Racetrack
- Current-Driven Skyrmion Dynamics and Drive-Dependent Skyrmion Hall Effect in an Ultrathin Film
- Current-induced magnetization dynamics in disordered itinerant ferromagnets
- Stabilization and current-induced motion of antiskyrmion in the presence of anisotropic Dzyaloshinskii-Moriya interaction
- Internal modes of a skyrmion in the ferromagnetic background in chiral magnets
- Driven skyrmions and dynamical transitions in chiral magnets
- Influence of a Uniform Current on Collective Magnetization Dynamics in a Ferromagnetic Metal
- Current driven magnetization dynamics in ferromagnetic nanowires with Dzyaloshinskii-Moriya interaction
- Spin eigen-excitations of the magnetic skyrmion and problem of the effective mass
- Phenomenology of current-induced skyrmion motion in antiferromagnets
- Current-driven vortex domain wall dynamics by micromagnetic simulations
- Asymmetric skyrmion Hall effect in systems with a hybrid Dzyaloshinskii-Moriya interaction
- Skyrmion production on demand by homogeneous DC currents
- Overcoming the speed limit in skyrmion racetrack devices by suppressing the skyrmion Hall effect
- Skyrmion-Antiskyrmion pair creation by in-plane currents
- Characterizing breathing dynamics of magnetic (anti-)skyrmions within the Hamiltonian formalism
- Spin eigen-excitations of an antiferromagnetic skyrmion
- Universality of annihilation barriers of large magnetic skyrmions in chiral and frustrated magnets
- Theory of Dzyaloshinskii domain wall tilt in ferromagnetic nanostrips
- Dynamics and inertia of a skyrmion in chiral magnets and interfaces: A linear response approach based on magnon excitations
- Effective description of domain wall strings
- Annihilation of Domain Walls in a Ferromagnetic Wire
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- Geometry and Symmetry in Skyrmion Dynamics
- Skyrmion Dynamics in the Presence of Deformation
- Voltage-Controlled Skyrmionic Interconnect with Multiple Magnetic Information Carriers
- Current-induced H-shaped-skyrmion creation and their dynamics in the helical phase
- Current-Induced Dynamics of Chiral Magnetic Structures: Creation, Motion, and Applications
- Ultrafast manipulations of nanoscale skyrmioniums
- Response of the chiral soliton lattice to spin polarized currents
- Motion-induced inertial effects and topological phase transitions in skyrmion transport
- Elliptical skyrmions: theory and nucleation by a magnetic tip in an antiskyrmion-hosting material
- Inducing Skyrmion Flop Transitions in CoZnMn at Room Temperature
- Effects of interlayer Dzyaloshinskii-Moriya interaction on the shape and dynamics of magnetic twin-skyrmions