作者
Rinke J Wijngaarden, Marco S Welling, Christof M Aegerter, Mariela Menghini
发表日期
2006/3
期刊
The European Physical Journal B-Condensed Matter and Complex Systems
卷号
50
页码范围
117-122
出版商
EDP sciences
简介
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.
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RJ Wijngaarden, MS Welling, CM Aegerter… - The European Physical Journal B-Condensed Matter …, 2006