FLUX-PENETRATION AND OVERCRITICAL CURRENTS IN FLAT SUPERCONDUCTORS WITH IRRADIATION-ENHANCED EDGE PINNING - THEORY AND EXPERIMENT

被引：106

作者：

SCHUSTER, T ^{[1
]}

INDENBOM, MV ^{[1
]}

KUHN, H ^{[1
]}

BRANDT, EH ^{[1
]}

KONCZYKOWSKI, M ^{[1
]}

机构：

[1] ECOLE POLYTECH, SOLIDES IRRADIES LAB, F-91128 PALAISEAU, FRANCE

来源：

PHYSICAL REVIEW LETTERS | 1994年 / 73卷 / 10期

关键词：

D O I：

10.1103/PhysRevLett.73.1424

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Penetration of perpendicular magnetic flux into a Bi(2)Sr(2)CaCu(2)O(8+)delta single crystal platelet with irradiation-enhanced pinning in its edge zone is observed by magneto-optics. When the flux front reaches the inner boundary of the irradiated zone, magnetic flux leaks to the center and then gradually fills the unirradiated zone from the middle. We observe vortex motion against the flux-density gradient (driven by the vortex curvature) and large ''overcritical'' Meissner currents in the flux-free zone. The measured flux profiles agree with planar calculations assuming a nonlinear resistivity with different critical current densities in the central and edge zones of a disk or strip.

引用

页码：1424 / 1427

页数：4

共 39 条

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