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Title: Thermal effects on transverse domain wall dynamics in magnetic nanowires

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.
Authors:
 [1] ;  [2] ; ; ; ;  [1] ; ;  [3] ;  [4] ;  [5] ;  [6]
  1. Department of Electrical Energy, Systems and Automation, Ghent University, 9000 Gent (Belgium)
  2. (Belgium)
  3. Department of Solid State Sciences, Ghent University, 9000 Gent (Belgium)
  4. COMP Centre of Excellence and Helsinki Institute of Physics, Department of Applied Physics, Aalto University School of Science, P.O. Box 11100, FI-00076 Aalto (Finland)
  5. Istituto Nazionale di Ricerca Metrologica, Strada delle Cacce 91, 10135 Torino (Italy)
  6. (Italy)
Publication Date:
OSTI Identifier:
22402460
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 106; Journal Issue: 20; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ELECTRONIC EQUIPMENT; MAGNETIC MATERIALS; MAGNETIC MOMENTS; MAGNETIC STORAGE DEVICES; NANOWIRES; SPIN ORIENTATION; TEMPERATURE DEPENDENCE