Possible new edge barriers in polycrystalline superconductors
Department of Applied Mathematics, Donbass Engineering
Academy 84313 Kramatorsk, Ukraine
Corresponding author: firstname.lastname@example.org
Accepted: 12 June 2002
We present a theoretical prediction of the new edge barriers for Abrikosov vortex penetration into polycrystalline superconductors. The traditional Bean-Livingston surface barrier is governed by the strength of the external field. Edge barriers in polycrystalline superconductors are also governed by the external field as well as by the anisotropy ratio, grain-coupling strength and grain size. We support our theory with concrete calculation of the critical current density in both high- oxide and superconductors.
PACS: 74.60.Ec – Mixed state, critical fields, and surface sheath / 74.60.Ge – Flux pinning, flux creep, and flux-line lattice dynamics / 74.60.Jg – Critical currents
© EDP Sciences, 2002