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Proceedings Paper

Confinement of the flux-line lattice in nanostructured superconducting films and multilayers
Author(s): Yvon Bruynseraede; Vitaly V. Metlushko; K. Temst; M. Baert; E. Rosseel; M. J. Van Bael; Victor V. Moshchalkov
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Paper Abstract

We have studied the flux-line confinement by a triangular and square array of submicron holes (antidots) in superconducting films (Pb, WGe) and multilayers (Pb/Ge). For large antidots, sharp cusp-like magnetization anomalies appear at the matching fields Hm, caused by the formation of multi-quanta vortices at each subsequent Hm. Critical current density jc and pinning force fp are strongly enhanced due to the pinning of single- or multiple-quanta vortices by the antidots. For relatively small antidots, new composite flux-line lattices, consisting of single- or multi-quanta vortices at antidots and single vortices at the interstices are observed at temperatures close to the critical temperature. The measurements of jc and fp for several antidot radii demonstrate that pinning centers with a size considerably larger than the coherence length are very efficient.

Paper Details

Date Published: 5 July 1996
PDF: 11 pages
Proc. SPIE 2697, Oxide Superconductor Physics and Nano-Engineering II, (5 July 1996); doi: 10.1117/12.250246
Show Author Affiliations
Yvon Bruynseraede, Katholieke Univ. Leuven (Belgium)
Vitaly V. Metlushko, Katholieke Univ. Leuven (Belgium)
K. Temst, Katholieke Univ. Leuven (Belgium)
M. Baert, Katholieke Univ. Leuven (Belgium)
E. Rosseel, Katholieke Univ. Leuven (Belgium)
M. J. Van Bael, Katholieke Univ. Leuven (Belgium)
Victor V. Moshchalkov, Katholieke Univ. Leuven (Belgium)

Published in SPIE Proceedings Vol. 2697:
Oxide Superconductor Physics and Nano-Engineering II
Ivan Bozovic; Davor Pavuna, Editor(s)

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