Magnetic domain walls are proposed as data carriers in future spintronic devices, whose reliability depends on a complete understanding of the domain wall motion. Applications based on an accurate positioning of domain walls are inevitably influenced by thermal fluctuations. In this letter, we present a micromagnetic study of the thermal effects on this motion. As spin-polarized currents are the most used driving mechanism for domain walls, we have included this in our analysis. Our results show that at finite temperatures, the domain wall velocity has a drift and diffusion component, which are in excellent agreement with the theoretical values obtained from a generalized 1D model. The drift and diffusion component are independent of each other in perfect nanowires, and the mean square displacement scales linearly with time and temperature.

Thermal effects on transverse domain wall dynamics in magnetic nanowires / Leliaert, J.; Van de Wiele, B.; Vandermeulen, J.; Coene, A.; Vansteenkiste, A.; Laurson, L.; Durin, G.; Van Waeyenberge, B.; Dupré, L.. - In: APPLIED PHYSICS LETTERS. - ISSN 0003-6951. - 106:20(2015), p. 202401. [10.1063/1.4921421]

Thermal effects on transverse domain wall dynamics in magnetic nanowires

DURIN, GIANFRANCO;
2015

Abstract

Magnetic domain walls are proposed as data carriers in future spintronic devices, whose reliability depends on a complete understanding of the domain wall motion. Applications based on an accurate positioning of domain walls are inevitably influenced by thermal fluctuations. In this letter, we present a micromagnetic study of the thermal effects on this motion. As spin-polarized currents are the most used driving mechanism for domain walls, we have included this in our analysis. Our results show that at finite temperatures, the domain wall velocity has a drift and diffusion component, which are in excellent agreement with the theoretical values obtained from a generalized 1D model. The drift and diffusion component are independent of each other in perfect nanowires, and the mean square displacement scales linearly with time and temperature.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11696/52507
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