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Vortex chain size effect and negative resistance in pin-free superconducting films

Vortex chain size effect and negative resistance in pin-free superconducting films We investigate the static and dynamic behavior of vortices in a pin-free superconductor. A diffraction pattern is observed in the critical currentJ cvs. applied fieldH ∥parallel to the surface of a granular Al film. When one vortex chain is formed in the film,J cbecomes nearly equal to zero, which verifies that the sample is actually pin-free. An interaction between a radiofrequency current and moving vortices occurs, and theI–V curve shows peculiar nonlinear effects such as “real negative resistance.” The results are analogous to dc and ac Josephson effects. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Low Temperature Physics Springer Journals

Vortex chain size effect and negative resistance in pin-free superconducting films

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References (7)

Publisher
Springer Journals
Copyright
Copyright
Subject
Physics; Condensed Matter Physics; Characterization and Evaluation of Materials; Magnetism, Magnetic Materials
ISSN
0022-2291
eISSN
1573-7357
DOI
10.1007/BF00661444
Publisher site
See Article on Publisher Site

Abstract

We investigate the static and dynamic behavior of vortices in a pin-free superconductor. A diffraction pattern is observed in the critical currentJ cvs. applied fieldH ∥parallel to the surface of a granular Al film. When one vortex chain is formed in the film,J cbecomes nearly equal to zero, which verifies that the sample is actually pin-free. An interaction between a radiofrequency current and moving vortices occurs, and theI–V curve shows peculiar nonlinear effects such as “real negative resistance.” The results are analogous to dc and ac Josephson effects.

Journal

Journal of Low Temperature Physics – Springer Journals

Published: Nov 3, 2004

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