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Proceedings Paper

Artificially layered YBA2CU3O7-PRBA2CU3O7 heterostructures: growth, properties, and device applications
Author(s): Arun Inam
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Paper Abstract

We have investigated the influence of interface effects and CuO2 plane orientation on transport properties of high temperature superconducting (HTS) thin films in YBa2Cu3O7-PrBa2Cu3O7 (YBCO-PrBCO) heterostructures grown by pulsed laser deposition. Two unit cell ( »24 A) thick YBCO films, isolated in c-axis oriented PrBCO/YBCO/PrBCO trilayers, are found to superconduct at temperatures above 20 K, while films thicker than 6 unit cells display bulk superconducting properties. An epitaxial process has also been developed to grow YBCO films and YBCOIPrBCO heterostructures with the CuO2 planes oriented normal to the film surface. These a-axis oriented films display transport properties comparable to the best c-axis oriented films, and moreover, are better suited to the fabrication of sandwich-type Josephson junction devices by virtue of the longer superconductive coherence length normal to the direction of the YBCO-PrBCO barrier interface.

Paper Details

Date Published: 1 March 1992
Proc. SPIE 1597, Progress in High-Temperature Superconducting Transistors and Other Devices II, (1 March 1992); doi: 10.1117/12.2321826
Show Author Affiliations
Arun Inam, Bellcore (United States)

Published in SPIE Proceedings Vol. 1597:
Progress in High-Temperature Superconducting Transistors and Other Devices II

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