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Proceedings Paper

Enhancement of transition broadening by elastic strain in superconducting YBa2Cu3O7 ultrathin films and YBa2Cu3O7/PrBa2Cu3-xGaxO7 superlattices
Author(s): Andrea Gauzzi; Julien Bok; Jean-Pierre Contour; M. Drouet; D. Ravelosona
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Paper Abstract

We report measurements of surface impedance in YBa2Cu3O7 (YBCO) ultra-thin films and YBCO/PrBa2Cu3-xGaxO7 superlattices deposited by laser ablation on SrTiO3 with different thickness d of the YBCO sublayer. We find that the Tc is unchanged in relaxed or strained structures while the width follows two distinct regimes: it is narrow and slightly decreases with d in the former and is broad and follows the law (Delta) Tc approximately (root)d in the latter. We propose a simple argument which explains these two regimes in terms of statistical fluctuations of the number of carriers respectively in single relaxed crystalline domains and in the whole strained sublayer.

Paper Details

Date Published: 5 July 1996
PDF: 11 pages
Proc. SPIE 2697, Oxide Superconductor Physics and Nano-Engineering II, (5 July 1996); doi: 10.1117/12.250274
Show Author Affiliations
Andrea Gauzzi, Ecole Superieure de Physique et Chimie Industrielles (France)
Julien Bok, Ecole Superieure de Physique et Chimie Industrielles (France)
Jean-Pierre Contour, CNRS/Thomson CSF-LCR (France)
M. Drouet, CNRS/Thomson CSF-LCR (France)
D. Ravelosona, Ecole Superieure de Physique et Chimie Industrielles (France)


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

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