Current-induced Vortex Motion by Spin-Transfer Torque

Abstract

We investigate the dynamics of a magnetic vortex driven by spin-transfer torque due to spin current in the adiabatic case. The vortex core represented by collective coordinate experiences a transverse force proportional to the product of spin current and gyrovector, which can be interpreted as the geometric force determined by topological charges. We show that this force is just a reaction force of Lorentz-type force from the spin current of conduction electrons. Based on our analyses, we propose analytically and numerically a possible experiment to check the vortex displacement by spin current in the case of single magnetic nanodot.

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• Switching magnetic vortex core by a single nanosecond current pulse
• Harmonic oscillator model for current- and field-driven magnetic vortices
• Spin torque and force due to current for general spin textures
• Theory of Domain Wall Dynamics under Current
• Current-induced vortex displacement and annihilation in a single Permalloy disk
• Gauge Field Formulation of Adiabatic Spin Torques
• Quantitative understanding of magnetic vortex oscillations driven by spin-polarized out-of-plane dc current: Analytical and micromagnetic numerical study
• Current-driven and field-driven domain walls at nonzero temperature
• Enhanced Non-Adiabaticity in Vortex Cores due to the Emergent Hall Effect
• Thermal vector potential theory of magnon-driven magnetization dynamics
• Proposal of a robust measurement scheme for the non-adiabatic spin torque using the displacement of magnetic vortices
• Current- and field-driven magnetic antivortices
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• Dissipative hydrodynamic equation of a ferromagnetic Bose-Einstein condensate: Analogy to magnetization dynamics in conducting ferromagnets
• Dissipative dynamics of magnetic solitons in metals
• Generation and stability of dynamical skyrmions and droplet solitons
• Microscopic Calculation of Spin Torques and Forces
• Mesoscopic Hall effect driven by chiral spin order
• In-Situ Contacting and Current-Injection into Samples in Photoemission Electron Microscopes
• Current-Induced Resonant Motion of a Magnetic Vortex Core: Effect of Nonadiabatic Spin Torque
• Exchange-mediated, non-linear, out-of-plane magnetic field dependence of the ferromagnetic vortex gyrotropic mode frequency driven by core deformation
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• Controlling stable Bloch points with electric currents
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• Controlling energy transfer time between two coupled magnetic vortex-state disks
• Tunable Ultrafast Dynamics of Antiferromagnetic Vortices in Nanoscale Dots
• Current driven defect unbinding transition in an XY ferromagnet
• Current Induced Vortex Wall Dynamics in Helical Magnetic Systems
• Probing the spin polarization of current by soft X-ray imaging of current-induced magnetic vortex dynamics