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Investigation of coupled DyBa2Cu3O7-(Y1-xPrx)Ba2Cu3O7 multilayer structures
Dept. de la Matière Condensée, University of Geneva, Geneva.
Dept. de la Matière Condensée, University of Geneva, Geneva.
Dept. de la Matière Condensée, University of Geneva, Geneva.
Dept. de la Matière Condensée, University of Geneva, Geneva.ORCID iD: 0000-0002-9858-6235
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1994 (English)In: Superconducting Superlattices and Multilayers / [ed] Ivan Bozovic, Bellingham: SPIE - International Society for Optical Engineering, 1994, Vol. 2157, 134-141 p.Conference paper, Published paper (Refereed)
Abstract [en]

We report on the behavior of high Tc superconductor coupled multilayer structures in magnetic field perpendicular to the ab plane. In these structures the number N of superconducting layers in the sample has been systematically varied. We extract the activation energy for flux motion from resistive measurements of the superconducting transitions. For samples containing N 24 angstroms thick DyBa2Cu3O7 layers, each separated from the next by 96 angstroms of an (Y0.45Pr0.55)Ba2Cu3O7 alloy, we find that the activation energy U increases linearly with the number N of layers for N < 3 - 4, and then saturates. The linear increase of U is taken as an evidence that coupling through (Y0.45Pr0.55)Ba2Cu3O7 increases the correlated volume involved in the flux motion and thus U. For N = 3 stacked pancake vortices move rigidly and the vortex lattice is 2D. For N > 3 - 4 shear of the vortex lattice becomes important, the vortex lattice dimensionally crosses-over to 3D, and the activation energy saturates.

Place, publisher, year, edition, pages
Bellingham: SPIE - International Society for Optical Engineering, 1994. Vol. 2157, 134-141 p.
Series
Proceedings of SPIE - The International Society for Optical Engineering, ISSN 0277786X ; 2157
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:kth:diva-50760DOI: 10.1117/12.179179ISBN: 0819414522 (print)OAI: oai:DiVA.org:kth-50760DiVA: diva2:462633
Conference
Superconducting Superlattices and Multilayers. Los Angeles, CA, USA. 24 January 1994 - 25 January 1994
Note
QC 20111213Available from: 2011-12-07 Created: 2011-12-07 Last updated: 2011-12-13Bibliographically approved

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Andersson, Magnus

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