Transport and vortex pinning in micron-size superconducting Nb films

Lamya Ghenim; Jean Yves Fortin; Gehui Wen; Xixiang Zhang; Claire Baraduc; Jean Claude Villegier

doi:10.1103/PhysRevB.69.064513

Transport and vortex pinning in micron-size superconducting Nb films

Lamya Ghenim, Jean Yves Fortin, Gehui Wen, Xixiang Zhang, Claire Baraduc, Jean Claude Villegier

Research output: Contribution to journal › Article › peer-review

9 Scopus citations

Abstract

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.

Original language	English (US)
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	69
Issue number	6
DOIs	https://doi.org/10.1103/PhysRevB.69.064513
State	Published - Feb 27 2004
Externally published	Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.69.064513

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abstract = "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 Bd and the upper critical field Bc2 are observed below Tc. 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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AU - Ghenim, Lamya

AU - Fortin, Jean Yves

AU - Wen, Gehui

AU - Zhang, Xixiang

AU - Baraduc, Claire

AU - Villegier, Jean Claude

PY - 2004/2/27

Y1 - 2004/2/27

N2 - 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 Bd and the upper critical field Bc2 are observed below Tc. 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.

AB - 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 Bd and the upper critical field Bc2 are observed below Tc. 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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JO - Physical Review B - Condensed Matter and Materials Physics

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ER -

Transport and vortex pinning in micron-size superconducting Nb films

Abstract

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