Paper published on the interaction of magnetisation and heat dynamics in pulsed domain wall movement

The following paper has been published in the Journal of Applied Physics:

Interaction of magnetization and heat dynamics for pulsed domain wall movement with Joule heating

http://dx.doi.org/10.1063/1.4966607

Abstract

Pulsed domain wall movement is studied here in Ni80Fe20 nanowires on SiO2 , using a fully integrated electrostatic, thermoelectric, and micromagnetics solver based on the Landau-Lifshitz-Bloch equation, including Joule heating, anisotropic magneto-resistance, and Oersted field contributions. During the applied pulse, the anisotropic magneto-resistance of the domain wall generates a dynamic heat gradient, which increases the current-driven velocity by up to 15%. Using a temperature-dependent conductivity, significant differences are found between the constant voltage-pulsed and constant current-pulsed domain wall movement: constant voltage pulses are shown to be more efficient at displacing domain walls whilst minimizing the increase in temperature , with the total domain wall displacement achieved over a fixed pulse duration having a maximum with respect to the driving pulse strength.
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