Transport and vortex pinning in micron-size superconducting Nb films

被引：13

作者：

Ghenim, L

Fortin, JY

Wen, GH

Zhang, XX

Baraduc, C

Villegier, JC

机构：

[1] Inst Max Von Laue Paul Langevin, F-38042 Grenoble, France

[2] CNRS, F-38042 Grenoble, France

[3] CNRS, Phys Theor Lab, UMR7085, F-67084 Strasbourg, France

[4] Hong Kong Univ Sci & Technol, Dept Phys, Kowloon, Hong Kong, Peoples R China

[5] CEA Grenoble, Dept Rech Fondamentale Mat Condensee, F-38054 Grenoble 9, France

来源：

PHYSICAL REVIEW B | 2004年 / 69卷 / 06期

关键词：

D O I：

10.1103/PhysRevB.69.064513

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have carried out Hall measurements on thin films of Nb in the flux-flow regime. The Hall bars were several microns in scale. Oscillations with magnetic field in the transverse and longitudinal resistances between the depinning field B-d and the upper critical field B-c2 are observed below T-c. The Hall effect may even change sign. The transverse and longitudinal resistances are interpreted in terms of current-driven motion of vortices in the presence of a few impurities. Simulations from time-dependent Ginzburg-Landau equations confirm this argument.

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页数：5

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