Enhanced Non-Adiabaticity in Vortex Cores due to the Emergent Hall Effect

Abstract

We present a combined theoretical and experimental study, investigating the origin of the enhanced non-adiabaticity of magnetic vortex cores. Scanning transmission X-ray microscopy is used to image the vortex core gyration dynamically to measure the non-adiabaticity with high precision, including a high confidence upper bound. Using both numerical computations and analytical derivations, we show that the large non-adiabaticity parameter observed experimentally can be explained by the presence of local spin currents arising from a texture-induced emergent Hall effect. This enhanced non-adiabaticity is only present in two- and three-dimensional magnetic textures such as vortices and skyrmions and absent in one-dimensional domain walls, in agreement with experimental observations.

6 pages, 3 figures

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• Tuning skyrmion Hall effect via engineering of spin-orbit interaction
• Effective damping enhancement in noncollinear spin structures
• Intrinsic non-adiabatic topological torque in magnetic skyrmions and vortices
• Role of an additional interfacial spin-transfer torque for current-driven skyrmion dynamics in chiral magnetic layers
• Robust edge states in magnetic domain-wall racetrack
• Band filling effects on the emergence of magnetic skyrmions: Pd/Fe and Pd/Co bilayers on Ir(111)
• Cooperative Charge Pumping and Enhanced Skyrmion Mobility
• Domain wall dynamics in easy-cone magnets
• Skyrmion phase in MnSi on sapphire grown by a conventional sputtering
• Numerical Computation of Spin-Transfer Torques for Antiferromagnetic Domain walls
• Temperature-Dependent Anisotropic Magnetoresistance and Spin-Torque-Driven Vortex Dynamics in a Single Microdisk
• Topological Aspects of Antiferromagnets
• Current-driven motion of magnetic topological defects in ferromagnetic superconductors