Influence of Joule heating on current-induced domain wall depinning

Abstract

The domain wall depinning from a notch in a Permalloy nanostrip on top of a $\mathrm{Si}{\mathrm{O}}_2/Si$ substrate is studied theoretically under application of static magnetic fields and the injection of short current pulses. The influence of Joule heating on current-induced domain wall depinning is explored self-consistently by coupling the magnetization dynamics in the ferromagnetic strip to the heat transport throughout the system. Our results indicate that Joule heating plays a remarkable role in these processes, resulting in a reduction in the critical depinning field and/or in a temporary destruction of the ferromagnetic order for typically injected current pulses. In agreement with experimental observations, similar pinning-depinning phase diagrams can be deduced for both current polarities when the Joule heating is taken into account. These observations, which are incompatible with the sole contribution of spin transfer torques, provide a deeper understanding of the physics underlying these processes and establish the real scope of the spin transfer torque. They are also relevant for technological applications based on current-induced domain-wall motion along soft strips.

References in corpus (4)

• Microscopic approach to current-driven domain wall dynamics
• Dynamic approach for micromagnetics close to the Curie temperature
• Optical spin transfer torque driven domain wall motion in ferromagnetic semiconductor
• Generalized analysis of thermally activated domain-wall motion in Co/Pt multilayers

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• Interaction of Magnetization and Heat Dynamics for Pulsed Domain Wall Movement with Joule Heating
• Current-driven skyrmion motion along disordered magnetic tracks
• Systematic motion of magnetic domain walls in notched nanowires under ultra-short current pulses
• Spin-torque-induced magnetization dynamics in ferrimagnets based on Landau-Lifshitz-Bloch Equation
• Current-driven domain wall motion along ferromagnetic strips with periodically-modulated perpendicular anisotropy
• Domain Wall Motion in Magnetic Nanostrips