Avalanches and Self-Organized Criticality in superconductors

R. J. Wijngaarden (), M. S. Welling, C. M. Aegerter and M. Menghini

The European Physical Journal B: Condensed Matter and Complex Systems, 2006, vol. 50, issue 1, 117-122

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. Copyright EDP Sciences/Società Italiana di Fisica/Springer-Verlag 2006

Keywords: 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 (search for similar items in EconPapers)
Date: 2006
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Citations: View citations in EconPapers (1)

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DOI: 10.1140/epjb/e2006-00063-7

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