Domain wall motion by localized temperature gradients

Abstract

Magnetic domain wall (DW) motion induced by a localized Gaussian temperature profile is studied in a Permalloy nanostrip within the framework of the stochastic Landau-Lifshitz-Bloch equation. The different contributions to thermally induced DW motion, entropic torque and magnonic spin transfer torque, are isolated and compared. The analysis of magnonic spin transfer torque includes a description of thermally excited magnons in the sample. A third driving force due to a thermally induced dipolar field is found and described. Finally, thermally induced DW motion is studied under realistic conditions by taking into account the edge roughness. The results give quantitative insights into the different mechanisms responsible for domain wall motion in temperature gradients and allow for comparison with experimental results.

12 pages, 12 figures

References in corpus (14)

• Current-driven dynamics of chiral ferromagnetic domain walls
• Spin Caloritronics
• Fokker-Planck and Landau-Lifshitz-Bloch Equations for Classical Ferromagnets
• All-magnonic spin-transfer torque and domain wall propagation
• Dynamic approach for micromagnetics close to the Curie temperature
• Magnetic domain-wall motion by propagating spin waves
• Magnon-Driven Domain-Wall Motion with the Dzyaloshinskii-Moriya Interaction
• Propagation of Thermally Induced Magnonic Spin Currents
• A thermodynamic theory for thermal-gradient-driven domain wall motion
• Thermophoresis of an Antiferromagnetic Soliton
• Landau-Lifshitz theory of the thermomagnonic torque
• Optical spin transfer torque driven domain wall motion in ferromagnetic semiconductor
• Thermodynamic Magnon Recoil for Domain Wall Motion
• Influence of Joule heating on current-induced domain wall depinning

Cited by in corpus (11)

• Magnetic texture based magnonics
• Helicity-dependent all-optical domain wall motion in ferromagnetic thin films
• Wiggling skyrmion propagation under parametric pumping
• Unveiling domain wall dynamics of ferrimagnets in thermal magnon currents: competition of angular momentum transfer and entropic torque
• Domain wall dynamics due to femtosecond laser-induced superdiffusive spin transport
• Thermally induced spin-transfer torques in superconductor/ferromagnet bilayers
• Brownian Motion and Entropic Torque Driven Motion of Domain-Wall in Antiferromagnets
• Thermal gradient driven domain wall dynamics
• The Landau-Lifshitz-Bloch equation for domain wall motion in antiferromagnets
• Equations of Motion and Frequency Dependence of Magnon-Induced Domain Wall Motion
• Influence of magnetic domain walls on all-optical magnetic toggle switching in a ferrimagnetic GdFe film