  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.
