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Journal of Applied Physics / Volume 111 / Issue 3 / ARTICLES / Magnetism and Superconductivity

J. Appl. Phys. 111, 033901 (2012); http://dx.doi.org/10.1063/1.3679146 (6 pages)

Micromagnetic analysis of the Rashba field on current-induced domain wall propagation

Eduardo Martinez

Universidad de Salamanca, Plaza de los Caidos s/n. E-37008, Salamanca, Spain

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(Received 7 September 2011; accepted 21 December 2011; published online 1 February 2012)

The current-driven domain wall propagation along a thin ferromagnetic strip with high perpendicular magnetocrystalline anisotropy is studied by means of micromagnetic simulations with emphasis on the role of the Rashba field, which has been predicted to play a dominant role in multilayer stacks with structure inversion asymmetry. Taking into account the surface roughness and thermal fluctuations, the results show a current dependence of the domain wall velocity in good qualitative agreement with recent experimental observations. It depicts (i) a low-current creep regime, where the domain wall velocity increases exponentially and (ii) a high-current linear regime where the wall propagates rigidly with a higher mobility than the one expected in the turbulent Walker regime. The analysis seems to be essential in order to get a better understanding of the magnitude of the non-adiabatic torque by direct comparison with experimental measurements.

© 2012 American Institute of Physics

Article Outline

  1. INTRODUCTION
  2. GEOMETRY, MATERIAL, AND MODELS
  3. DW DYNAMICS ALONG A PERFECT STRIP
  4. CURRENT-DRIVEN DW DYNAMICS ALONG STRIPS WITH SURFACE ROUGHNESS
  5. CONCLUSIONS

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KEYWORDS, PACS, and IPC

Keywords

ferromagnetism, magnetic domain walls, magnetic multilayers, magnetic thin films, micromagnetics, nanomagnetics, nanostructured materials, perpendicular magnetic anisotropy, spin-orbit interactions, surface roughness, torque

PACS

  • 75.75.Fk

    Domain structures in nanoparticles

  • 71.70.Ej

    Spin-orbit coupling, Zeeman and Stark splitting, Jahn-Teller effect

  • 75.30.Gw

    Magnetic anisotropy

  • 75.60.Ch

    Domain walls and domain structure

  • 75.70.Cn

    Magnetic properties of interfaces (multilayers, superlattices, heterostructures)

  • 75.70.Kw

    Domain structure (including magnetic bubbles and vortices)

International Patent Classification (IPC)

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3679146

PUBLICATION DATA

ISSN

0021-8979 (print)  
1089-7550 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

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