Influence of surface irregularities on barriers for vortex entry in type-II superconductors

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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.
revtex, 3 pages, no figures, minor corrections, references added

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Superconductivity

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http://salesiana.dossiersoluciones.com/handle/123456789/29984

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/9911430
 http://arxiv.org/abs/cond-mat/9911430

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arXiv