Low Temperature Physics: 35, 619 (2009); https://doi.org/10.1063/1.3224713 (8 pages)
Физика Низких Температур: Том 35, Выпуск 8-9 (Август 2009), c. 789-797    ( к оглавлению , назад )

Dendritic flux avalanches in superconducting films

V.V. Yurchenko1, T.H. Johansen1,2, and Y.M. Galperin1,3

1Department of Physics and Centre for Materials Science and Nanotechnology, University of Oslo P.O. Box 1048, Blindern, 0316 Oslo, Norway
E-mail: Vitaliy.Yurchenko@smn.uio.no

2Institute for Superconducting and Electronic Materials, University of Wollongong, NSW, Australia

3A.F. Ioffe Physico-Technical Institute, St Petersburg 194021, Russia

Received February 13, 2009


Thermomagnetic instability in general, and dendritic flux avalanches in particular, have attracted considerable attention of both scientists and engineers working on superconductor applications. Though being harmful for the performance of many superconducting devices, the avalanches provide a fruitful playground for experimental and theoretical studies of complex dynamics of the vortex matter. In this paper, we report on the progress in understanding the mechanisms responsible for the development of the giant magnetic avalanches. We review recent results on magneto-optical imaging of the fingering instability in superconducting films and analyze them basing on the recent theoretical model that establishes criteria for onset of the dendritic avalanches.

PACS: 74.25.Qt Vortex lattices, flux pinning, flux creep;
PACS: 74.25.Ha Magnetic properties;
PACS: 68.60.Dv Thermal stability; thermal effects.

Key words: superconducting films, flux avalanche, vortices in superconductor.