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On ultrafast magnetic flux dendrite propagation into thin superconducting films

B. Biehler·B. -U. Runge·P. Leiderer·R. G. Mints
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Abstract

We suggest a new theoretical approach describing the velocity of magnetic flux dendrite penetration into thin superconducting films. The key assumptions for this approach are based upon experimental observations. We treat a dendrite tip motion as a propagating flux jump instability. Two different regimes of dendrite propagation are found. A fast initial stage is followed by a slow stage, which sets in as soon as a dendrite enters into the vortex-free region. We find that the dendrite velocity is inversely proportional to the sample thickness. The theoretical results and experimental data obtained by a magneto-optic pump-probe technique are compared and excellent agreement between the calculations and measurements is found.

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B. Biehler, B. -U. Runge, P. Leiderer, R. G. Mints. 2004-10-01. On ultrafast magnetic flux dendrite propagation into thin superconducting films. https://doi.org/10.1103/physrevb.72.024532

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