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Avalanches and Self-Organized Criticality in superconductors

  • R. J. WijngaardenEmail author
  • M. S. Welling
  • C. M. Aegerter
  • M. Menghini
Condensed Matter

Abstract.

We review the use of superconductors as a playground for the experimental study of front roughening and avalanches. Using the magneto-optical technique, the spatial distribution of the vortex density in the sample is monitored as a function of time. The roughness and growth exponents corresponding to the vortex `landscape' are determined and compared to the exponents that characterize the avalanches in the framework of Self-Organized Criticality. For those situations where a thermo-magnetic instability arises, an analytical non-linear and non-local model is discussed, which is found to be consistent to great detail with the experimental results. On anisotropic substrates, the anisotropy regularizes the avalanches.

PACS.

05.65.+b Self-organized systems 74.25.Fy Transport properties (electric and thermal conductivity, thermoelectric effects, etc.) 74.25.Qt Vortex lattices, flux pinning, flux creep  

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Copyright information

© EDP Sciences/Società Italiana di Fisica/Springer-Verlag 2006

Authors and Affiliations

  • R. J. Wijngaarden
    • 1
    Email author
  • M. S. Welling
    • 1
  • C. M. Aegerter
    • 1
  • M. Menghini
    • 1
  1. 1.Department of Physics and AstronomyFaculty of Sciences, Free UniversityAmsterdamThe Netherlands

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