Influence of material defects on current-driven vortex domain wall mobility

Abstract

Many future concepts for spintronic devices are based on the current-driven motion of magnetic domain walls through nanowires. Consequently a thorough understanding of the domain wall mobility is required. However, the magnitude of the nonadiabatic component of the spin-transfer torque driving the domain wall is still debated today as various experimental methods give rise to a large range of values for the degree of nonadiabaticity. Strikingly, experiments based on vortex domain wall motion in magnetic nanowires consistently result in lower values compared to other methods. Based on the micromagnetic simulations presented in this contribution we can attribute this discrepancy to the influence of distributed disorder which vastly affects the vortex domain wall mobility, but is most often not taken into account in the models adopted to extract the degree of nonadiabaticity.

arXiv comment5 pages, 4 figures

References in corpus (14)

• Roles of non-equilibrium conduction electrons on magnetization dynamics of ferromagnets
• Micromagnetic understanding of current-driven domain wall motion in patterned nanowires
• Creep and flow regimes of magnetic domain wall motion in ultrathin Pt/Co/Pt films with perpendicular anisotropy
• Direct observation of domain-wall configurations transformed by spin currents
• MuMax: a new high-performance micromagnetic simulation tool
• Spin-Torque Driven Magnetization Dynamics: Micromagnetic Modelling
• Current-induced magnetization dynamics in disordered itinerant ferromagnets
• Dynamics of Pinned Magnetic Vortices
• Non-adiabatic spin torque investigated using thermally activated magnetic domain wall dynamics
• Effects of Disorder and Internal Dynamics on Vortex Wall Propagation
• Magnetic memory and current amplification devices using moving domain walls
• Surface Roughness Dominated Pinning Mechanism of Magnetic Vortices in Soft Ferromagnetic Films
• The effect of disorder on transverse domain wall dynamics in magnetic nanostrips
• Spin-transfer torque in disordered weak ferromagnets

Cited by in corpus (9)

• Few-nm tracking of magnetic vortex orbits and their decay with ultrafast Lorentz microscopy
• Domain walls within domain walls in wide ferromagnetic strips
• Effective Field Model of Roughness in Magnetic Structures
• Intrinsic non-adiabatic topological torque in magnetic skyrmions and vortices
• Current-Driven Domain Wall Depinning and Propagation in Notched Nanowires
• Fast vortex wall motion in wide Permalloy strips from double switching of the vortex core
• Coarsening dynamics of topological defects in thin Permalloy films
• Strong entanglement of spins inside a quantum domain wall
• Skyrmions as Compact, Robust and Energy-Efficient Interconnects for Domain Wall (DW)-based Systems