Confinement of the flux-line lattice in nanostructured superconducting films and multilayers

Yvon Bruynseraede; Vitaly V. Metlushko; K. Temst; M. Baert; E. Rosseel; M. J. Van Bael; Victor V. Moshchalkov

doi:10.1117/12.250246

5 July 1996 Confinement of the flux-line lattice in nanostructured superconducting films and multilayers

Yvon Bruynseraede, Vitaly V. Metlushko, K. Temst, M. Baert, E. Rosseel, M. J. Van Bael, Victor V. Moshchalkov

Proceedings Volume 2697, Oxide Superconductor Physics and Nano-Engineering II; (1996) https://doi.org/10.1117/12.250246
Event: Photonics West '96, 1996, San Jose, CA, United States

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 H_m, caused by the formation of multi-quanta vortices at each subsequent H_m. Critical current density j_c and pinning force f_p 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 j_c and f_p for several antidot radii demonstrate that pinning centers with a size considerably larger than the coherence length are very efficient.

Citation Download Citation

Yvon Bruynseraede, Vitaly V. Metlushko, K. Temst, M. Baert, E. Rosseel, M. J. Van Bael, and Victor V. Moshchalkov "Confinement of the flux-line lattice in nanostructured superconducting films and multilayers", Proc. SPIE 2697, Oxide Superconductor Physics and Nano-Engineering II, (5 July 1996); https://doi.org/10.1117/12.250246

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