C-axis transport properties and intrinsic Josephson effect in YBa/sub 2/Cu/sub 3/O/sub 7/-films

Author

Prusseit, W. ; Rapp, M. ; Semerad, R.

Author_Institution

Dept. of Phys., Tech. Univ. Munchen, Germany

Volume

7

Issue

2

fYear

1997

fDate

6/1/1997 12:00:00 AM

Firstpage

2952

Lastpage

2955

Abstract

We have developed a standard photolithographic process to fabricate intrinsic Josephson effect (IJE) devices on the basis of thin films. In this way the dimensions of the structures could be reduced into the micron range which turned out to be essential to observe IJE signatures. Another key point was a reduction of the interlayer coupling in YBa/sub 2/Cu/sub 3/O/sub 7-/spl delta// (YBCO) which could be realized by removal of chain oxygen. The enhanced anisotropy led to RSJ-like current-voltage characteristics as well as microwave emission at 11 GHz and 24 GHz up to temperatures slightly below T/sub c/ demonstrating intrinsic Josephson coupling in YBCO for the first time.

Keywords

Josephson effect; barium compounds; high-temperature superconductors; photolithography; superconducting thin films; yttrium compounds; 11 to 24 GHz; RSJ model; YBa/sub 2/Cu/sub 3/O/sub 7/; YBa/sub 2/Cu/sub 3/O/sub 7/ film; anisotropy; c-axis transport properties; current-voltage characteristics; fabrication; interlayer coupling; intrinsic Josephson effect; microwave emission; photolithography; Conductivity; Gold; Insulation; Josephson effect; Probes; Resists; Substrates; Superconducting films; Temperature; Yttrium barium copper oxide;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.621930

Filename

621930