Thermodynamic Magnon Recoil for Domain Wall Motion

Abstract

We predict a thermodynamic magnon recoil effect for domain wall motions in the presence of temperature gradients. All current thermodynamic theories assert that a magnetic domain wall must move toward the hotter side, based on equilibrium thermodynamic arguments. Microscopic calculations on the other hand show that a domain wall can move either along or against the direction of heat currents, depending on how strong the heat currents are reflected by the domain wall. We have resolved the inconsistency between these two approaches by augmenting the theory in the presence of thermal gradients by incorporating in the free energy of domain walls by a heat current term present in nonequilibrium steady states. The condition to observe a domain wall propagation toward the colder regime is derived analytically and can be tested by future experiments.

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Cited by in corpus (11)

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• Controlling Chiral Domain Walls in Antiferromagnets Using Spin-Wave Helicity
• Domain wall motion by localized temperature gradients
• Unveiling domain wall dynamics of ferrimagnets in thermal magnon currents: competition of angular momentum transfer and entropic torque
• Thermally induced magnonic spin current, thermomagnonic torques and domain wall dynamics in the presence of Dzyaloshinskii-Moriya interaction
• Thermal gradient driven domain wall dynamics
• Equations of Motion and Frequency Dependence of Magnon-Induced Domain Wall Motion
• Swift thermal steering of domain walls in ferromagnetic MnBi stripes
• High-speed antiferromagnetic domain walls driven by coherent spin waves
• Role of shape anisotropy on thermal gradient-driven domain wall dynamics in magnetic nanowires