Magnetic field of Josephson vortices outside superconductors

Details Magnetic field of Josephson vortices outside superconductors Magnetic field of Josephson vortices outside superconductors

2008-02-24

arxiv.org/abs/0802.3545v2

Physics

Condensed Matter

Superconductivity

5 RevTeX pages, 3 eps figures. The second version includes more detailed explanations and corrections, and slightly modified f

Scientific paper

10.1103/PhysRevB.77.132504

We consider the structure of Josephson vortices approaching the junction boundary with vacuum in large area Josephson junctions with the Josephson length $\lambda_J$ large relative to the London penetration depth $\lambda_L$. Using the stability argument for one-dimentional solitons with respect to 2D perturbations, it is shown that on the scale $\lambda_J$ the Josephson vortices do not spread near the boundary in the direction of the junction. %, which is in a striking difference with behavior of Abrikosov vortices exiting superconductors. The field distribution in vacuum due to the Josephson vortex is evaluated, the information needed for the Scanning SQUID Microscopy.

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