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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