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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Research Article| October 31 2016
Interaction of magnetization and heat dynamics for pulsed domain wall movement with Joule heating
Serban Lepadatu; Interaction of magnetization and heat dynamics for pulsed domain wall movement with Joule heating. J. Appl. Phys. 28 October 2016; 120 (16): 163908. https://doi.org/10.1063/1.4966607
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