Influence of surface irregularities on barriers for vortex entry in type-II superconductors
Superconductivity
2007-05-23 v2
Abstract
A theoretical description of the influence of surface irregularities (such as wedge-like cracks) on the Bean-Livingston energy barrier is presented. A careful quantitative estimate of the field of the first vortex entry H* into a homogeneous bulk superconductor with crack-like defects is obtained. This estimate is based on an exact analytical solution for the Meissner current distribution in a bulk superconductor with a single two-dimensional infinitely thin crack. This thin crack is characterized by the lowest H* value, and, thus, appears to be the best gate for vortex entry.
Keywords
Cite
@article{arxiv.cond-mat/9911430,
title = {Influence of surface irregularities on barriers for vortex entry in type-II superconductors},
author = {A. Yu. Aladyshkin and A. S. Mel'nikov and I . A. Shereshevsky and I. D. Tokman},
journal= {arXiv preprint arXiv:cond-mat/9911430},
year = {2007}
}
Comments
revtex, 3 pages, no figures, minor corrections, references added