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Proceedings Paper

Fabrication and properties of all a-axis oriented YBaCuO-PrBaCuO-YBaCuO Josephson junctions
Author(s): Florence Pourtier; Jean-Claude Villegier
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Paper Abstract

YBaCuO-PrBaCuO-YBaCuO a-axis oriented trilayer structures was realized by in-situ ICM (Inverted Cylindrical Magnetron) sputtering method, including a template step. Cross type junctions of micrometer size were patterned with a trilayer SNOP process. Their Josephson and tunneling characteristics have been investigated for various thicknesses of the PrBaCuO barrier (10- 100 nm). The critical current was found proportional to exp(-(alpha) T1/2) (SNS type in the dirty limit) where (alpha) was a constant. Strong and reproducible non-linearities were observed on the I-V curves especially above 10 mV and analyzed in terms of tunneling process. Tunnel barrier and interface models are proposed to explain the low critical current-normal resistance products (0.4 mV at 4.2(Kappa) ) as well as the I-V curves.

Paper Details

Date Published: 2 July 1994
PDF: 6 pages
Proc. SPIE 2160, Superconductive Devices and Circuits, (2 July 1994); doi: 10.1117/12.180988
Show Author Affiliations
Florence Pourtier, LETI-CEA (France)
Jean-Claude Villegier, LETI-CEA (France)

Published in SPIE Proceedings Vol. 2160:
Superconductive Devices and Circuits
Robert A. Buhrman; John T. Clarke; Ken Daly; Roger H. Koch; Jerome A. Luine; Randy W. Simon, Editor(s)

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