| Issue |
Europhys. Lett.
Volume 59, Number 5, September 2002
|
|
|---|---|---|
| Page(s) | 768 - 773 | |
| Section | Condensed matter: electronic structure, electrical, magnetic, and optical properties | |
| DOI | https://doi.org/10.1209/epl/i2002-00192-1 | |
| Published online | 01 September 2002 | |
Possible new edge barriers in polycrystalline superconductors
Department of Applied Mathematics, Donbass Engineering
Academy 84313 Kramatorsk, Ukraine
Corresponding author: apmath@dgma.donetsk.ua
Received:
20
March
2002
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
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