Superconducting nano-layer coating without insulator

Abstract

The superconducting nano-layer coating without insulator layer is studied. The magnetic-field distribution and the forces acting on a vortex are derived. Using the derived forces, the vortex-penetration field and the lower critical magnetic field can be discussed. The vortex-penetration field is identical with the multilayer coating, but the lower critical magnetic field is not. Forces acting on a vortex from the boundary of two superconductors play an important role in evaluations of the free energy.

4 pages, 4 figures, the 27th Linear Accelerator Conference, LINAC14, Geneva, Switzerland, 31 August - 5 September, 2014