Intrinsic non-adiabatic topological torque in magnetic skyrmions and vortices

Abstract

We propose that topological spin currents flowing in topologically non-trivial magnetic textures, such as magnetic skyrmions and vortices, produce an intrinsic non-adiabatic torque of the form ${\mathbf{T}}_t\sim [({\partial }_x\mathbf{m}\times {\partial }_y\mathbf{m})\cdot \mathbf{m}]{\partial }_y\mathbf{m}$. We show that this torque, which is absent in one-dimensional domain walls and/or non-topological textures, is responsible for the enhanced non-adiabaticity parameter observed in magnetic vortices compared to one-dimensional textures. The impact of this torque on the motion of magnetic skyrmions is expected to be crucial, especially to determine their robustness against defects and pinning centers.

7 pages, 4 figures

References in corpus (12)

• Additive interfacial chiral interaction in multilayers for stabilization of small individual skyrmion at room temperature
• Theory of current-driven motion of Skyrmions and spirals in helical magnets
• Rotating skyrmion lattices by spin torques and field or temperature gradients
• High domain wall velocities induced by current in ultrathin Pt/Co/AlOx wires with perpendicular magnetic anisotropy
• Electron Transport Driven by Nonequilibrium Magnetic Textures
• Spin pumping by a field-driven domain wall
• Spin orbit precession damping in transition metal ferromagnets
• Current-driven vortex domain wall dynamics by micromagnetic simulations
• Spin Pumping of Current in Non-Uniform Conducting Magnets
• Spin torque and force due to current for general spin textures
• Topological Hall and Spin Hall Effects in Disordered Skyrmionic Textures
• Static and dynamic properties of vortices in anisotropic magnetic disks

Cited by in corpus (2)

• Role of an additional interfacial spin-transfer torque for current-driven skyrmion dynamics in chiral magnetic layers
• Topological Aspects of Antiferromagnets