Current-driven nucleation and propagation of antiferromagnetic skyrmionium
arXiv:1904.06870 · doi:10.1103/PhysRevB.102.014458
Abstract
We present a theoretical study on nucleation and propagation of antiferromagnetic skyrmionium induced by spin current injection. A skyrmionium, also known as 2π skyrmion, is a vortex-like magnetic structure characterized by a topological charge, the so-called skyrmion number, being zero. We find that an antiferromagnetic skyrmionium can be generated via a local injection of spin current with toroidal distribution. A spatially uniform spin current is then demonstrated to induce a propagation of the skyrmionium. We derive an expression for the skyrmionium velocity based on a collective-coordinate model, which agrees well with our numerical results. Our findings suggest a novel way of nucleating an antiferromagnetic skyrmionium, as well as an analytical estimation of the current-driven skyrmionium velocity.
References in corpus (31)
- Skyrmion Lattice in a Chiral Magnet
- Antiferromagnetic spintronics
- Antiferromagnetic spintronics
- Advances in the Physics of Magnetic Skyrmions and Perspective for Technology
- Spontaneous Skyrmion Ground States in Magnetic Metals
- Spin Torque Ferromagnetic Resonance Induced by the Spin Hall Effect
- Spin Transfer Torques in MnSi at Ultra-low Current Densities
- Direct Observation of the Skyrmion Hall Effect
- Skyrmion Hall Effect Revealed by Direct Time-Resolved X-Ray Microscopy
- Static and Dynamical Properties of Antiferromagnetic Skyrmions in the Presence of Applied Current and Temperature
- Antiferromagnetic Skyrmion: Stability, Creation and Manipulation
- Skyrmion-electronics: Writing, deleting, reading and processing magnetic skyrmions toward spintronic applications
- Thermally Driven Ratchet Motion of Skyrmion Microcrystal and Topological Magnon Hall Effect
- Laser-Induced Magnetic Nanostructures with Tunable Topological Properties
- Spin transfer and current-induced switching in antiferromagnets
- Dynamics of an Insulating Skyrmion under a Temperature Gradient
- Magnon-skyrmion scattering in chiral magnets
- Control and manipulation of a magnetic skyrmionium in nanostructures
- Magnetic structures and reorientation transitions in noncentrosymmetric uniaxial antiferromagnets
- Ultrafast Magnetization Reversal by Picosecond Electrical Pulses
- Theory of magnon-skyrmion scattering in chiral magnets
- Antiferromagnetic skyrmion crystals: generation, topological Hall and topological spin Hall effect
- Ultrafast generation of skyrmionic defects with vortex beams: printing laser profiles on magnets
- Skyrmion dynamics in chiral ferromagnets
- Electrical writing, deleting, reading, and moving of magnetic skyrmioniums in a racetrack device
- Phenomenology of current-induced skyrmion motion in antiferromagnets
- Theory of Topological Spin Hall Effect in Antiferromagnetic Skyrmion: Impact on Current-induced Motion
- Skyrmion Dynamics in Multiferroic Insulator
- Skyrmions in a Doped Antiferromagnet
- Antiferromagnetic textures and dynamics on the surface of a heavy metal
- Skyrmion-number dependence of spin-transfer torque on magnetic bubbles