Plastic Flow, Voltage Bursts, and Vortex Avalanches in Superconductors

Details Plastic Flow, Voltage Bursts, and Vortex Avalanches in Superconductors Plastic Flow, Voltage Bursts, and Vortex Avalanches in Superconductors

1996-12-09

arxiv.org/abs/cond-mat/9612078v1

Physica C 290, 89 (1997).

Physics

Condensed Matter

Superconductivity

4 pages, Latex, 4 figures included. Movies available at http://www-personal.engin.umich.edu/~nori

Scientific paper

We use large-scale parallel simulations to compute the motion of superconducting magnetic vortices during avalanches triggered by small field increases. We find that experimentally observable voltage bursts correspond to pulsing vortex movement along branched channels or winding chains, and relate vortex flow images to features of statistical distributions. As pin density is increased, a crossover occurs from interstitial motion in narrow easy-flow winding channels with typical avalanche sizes, to pin-to-pin motion in broad channels, characterized by a very broad distribution of sizes. Our results are consistent with recent experiments.

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