Chain model for the spiral instability of the force-free configuration in thin superconducting films

Yu. A. Genenko; P. Troche; J. Hoffmann; H. C. Freyhardt

doi:10.1103/PhysRevB.58.11638

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Chain model for the spiral instability of the force-free configuration in thin superconducting films

Yu. A. Genenko, P. Troche, J. Hoffmann, H. C. Freyhardt

DOI 10.1103/PhysRevB.58.11638 · Physical Review B

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Abstract

The developed stage of a spiral instability of the magnetic flux line in a thin film is studied. The instability of a one-dimensional (1D) flux-line lattice parallel to a thin superconducting film surface and to a transport current is modeled as a transformation of initial linear flux lines into chains of 2D vortices crossing the film and tilted in the field direction. The pitch length of the first instable spiral-like chain structure turns out to be of the order of a film thickness at all fields, which leads to a dissipation rate comparable in magnitude with the experimental one.