Thin film composites of Au and YBa/sub 2/Cu/sub 3/O/sub 7-/spl delta//

Author

Allen, L.H. ; Cukauskas, E.J. ; Fisher, M.A.

Author_Institution

Naval Res. Lab., Washington, DC, USA

Volume

5

Issue

2

fYear

1995

fDate

6/1/1995 12:00:00 AM

Firstpage

1218

Lastpage

1221

Abstract

We are using a novel bilayer deposition process to grow composite films of Au with YBa/sub 2/Cu/sub 3/O/sub 7-/spl delta//. The composites have well-separated regions of Au and YBa/sub 2/Cu/sub 3/O/sub 7-/spl delta//, and we see no evidence for structural or chemical degradation of the grains and grain boundaries. For composite films on MgO substrates, the transport properties indicate the presence of weakened superconductivity in the films. Composites on SrTiO/sub 3/ and LaAlO/sub 3/ do not show this as strongly. The MgO composites behave like arrays of Josephson junctions and show promise as materials for flux flow devices.<>

Keywords

Josephson effect; barium compounds; composite superconductors; flux flow; gold; grain boundaries; high-temperature superconductors; sputter deposition; superconducting thin films; yttrium compounds; Au-YBa/sub 2/Cu/sub 3/O/sub 7-/spl delta// composites; Au-YBa/sub 2/Cu/sub 3/O/sub 7/; Josephson junction arrays; LaAlO/sub 3/; MgO; SrTiO/sub 3/; bilayer deposition; chemical degradation; composite films growth; flux flow devices; grain boundaries; high temperature superconductors; sputter deposition; structural degradation; thin film composites; transport properties; weakened superconductivity; well-separated regions; Chemicals; Composite materials; Degradation; Gold; Grain boundaries; Josephson junctions; Substrates; Superconducting films; Superconductivity; Transistors;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.402781

Filename

402781