Nanosize texture and transport properties in Y-Ba-Cu-O films

Author

Ghigo, G. ; Chiodoni, A. ; Gerbaldo, R. ; Gozzelino, L. ; Minetti, B. ; Mezzetti, E. ; Camerlingo, C. ; Giannini, C.

Author_Institution

Politecnico di Torino, Italy

Volume

11

Issue

1

fYear

2001

fDate

3/1/2001 12:00:00 AM

Firstpage

3647

Lastpage

3650

Abstract

The magnetic-transport properties of thin YBCO films are accounted for by a network of intergranular “hidden” Josephson junctions. An accurate X-ray analysis reveals the existence of structural patterns with the same distribution function as the one found by fitting the J_c vs. B curves. The correspondence between the two distributions enables us to establish that the transport mechanism in those films is driven by the nanosize structural pattern behaving as an intergranular “hidden” array of Josephson junctions. It allows to find out for the first time how the J_c vs. B curves scale with temperature. The full analysis enables to determine the main parameters to modify in order to exploit the intrinsic properties of this network towards applications

Keywords

Josephson effect; barium compounds; critical current density (superconductivity); high-temperature superconductors; nanostructured materials; superconducting thin films; texture; yttrium compounds; HTSC; X-ray analysis; Y-Ba-Cu-O; Y-Ba-Cu-O films; applications; distribution function; intergranular hidden Josephson junctions; intrinsic properties; nanosize texture; structural patterns; transport mechanism; transport properties; Face detection; Intelligent networks; Josephson junctions; Magnetic films; Substrates; Surface morphology; Telephony; Temperature dependence; X-ray diffraction; Yttrium barium copper oxide;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.919855

Filename

919855