Flux penetration in slab shaped Type-I superconductors

Details Flux penetration in slab shaped Type-I superconductors Flux penetration in slab shaped Type-I superconductors

1996-10-07

arxiv.org/abs/cond-mat/9610039v1

Physics

Condensed Matter

Superconductivity

4 pages, 2 figures, Fig 2.(b) available upon request from the authors, email - bokil@chopin.ucsc.edu

Scientific paper

10.1103/PhysRevB.56.11195

We study the problem of flux penetration into type--I superconductors with high demagnetization factor (slab geometry).Assuming that the interface between the normal and superconducting regions is sharp, that flux diffuses rapidly in the normal regions, and that thermal effects are negligible, we analyze the process by which flux invades the sample as the applied field is increased slowly from zero.We find that flux does not penetrate gradually.Rather there is an instability in the process and the flux penetrates from the boundary in a series of bursts, accompanied by the formation of isolated droplets of the normal phase, leading to a multiply connected flux domain structure similar to that seen in experiments.

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