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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28 October 2016
Research Article|
October 31 2016
Interaction of magnetization and heat dynamics for pulsed domain wall movement with Joule heating
Serban Lepadatu
Serban Lepadatu
a)
Jeremiah Horrocks Institute for Mathematics, Physics and Astronomy,
University of Central Lancashire
, Preston PR1 2HE, United Kingdom
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J. Appl. Phys. 120, 163908 (2016)
Article history
Received:
July 01 2016
Accepted:
October 17 2016
Citation
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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