Modeling of temperature dependent current-voltage curves of YBCO/Ag composites

Author

Francavilla, T.L. ; Fisher, M.A. ; Allen, L.H. ; Cukauskas, E.J. ; Soulen, R.J., Jr.

Author_Institution

Naval Res. Lab., Washington, DC, USA

Volume

7

Issue

2

fYear

1997

fDate

6/1/1997 12:00:00 AM

Firstpage

1646

Lastpage

1649

Abstract

We have measured the current-voltage (I-V) characteristics of thin film composites made from YBa/sub 2/Cu/sub 3/O/sub 7-/spl delta// (YBCO) and Ag. When deposited upon a substrate, this material appears to form arrays of superconducting-normal-superconducting (SNS) junctions. To make these measurements, the films were patterned into microbridges and immersed directly into the cryogen to provide a constant temperature environment and to avoid problems of local heating. The data were fitted by several phenomenological models in an effort to understand the dissipation mechanism appropriate to these materials.

Keywords

Josephson effect; barium compounds; flux flow; high-temperature superconductors; silver; yttrium compounds; YBCO/Ag composites; YBa/sub 2/Cu/sub 3/O/sub 7-/spl delta///Ag; YBa/sub 2/Cu/sub 3/O/sub 7/-Ag; dissipation mechanism; high temperature superconductor; microbridges; superconducting-normal-superconducting junctions; temperature dependent current-voltage curves; Composite materials; Current measurement; Josephson junctions; Sputtering; Substrates; Superconducting devices; Superconducting materials; Superconducting thin films; Temperature dependence; Yttrium barium copper oxide;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.620893

Filename

620893