Flux flow anisotropy in superconducting films with a rectangular array of holes

We present a study of the flux penetration in YBa 2Cu 3O 7− x thin films with a rectangular array of holes (anti-dots), visualizing the magnetic flux density using an advanced magneto-optical technique. Flux penetration patterns are explained by a simple model based on the channeling of vortices alo...

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Bibliographic Details
Published in:Physica. C, Superconductivity Superconductivity, 2004-05, Vol.404 (1), p.410-414
Main Authors: Welling, Marco S., Wijngaarden, Rinke J., Aegerter, Christof M., Wördenweber, Roger, Lahl, Peter
Format: Article
Language:English
Subjects:
Anti-dots
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
High-tc films
Magneto-optics
Physics
Properties of type I and type II superconductors
Superconducting films and low-dimensional structures
Superconductivity
Vortex lattices ,flux pinning, flux creep
YBCO
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Summary:We present a study of the flux penetration in YBa 2Cu 3O 7− x thin films with a rectangular array of holes (anti-dots), visualizing the magnetic flux density using an advanced magneto-optical technique. Flux penetration patterns are explained by a simple model based on the channeling of vortices along rows of holes. In simulations this was found to lead to a large anisotropy ∼60 of the critical current. However, our experimental anisotropy of 1.30(5) is much smaller. We discuss possible reasons for this discrepancy.
ISSN:0921-4534
1873-2143
DOI:10.1016/j.physc.2003.11.026