Artificially layered YBA2CU3O7-PRBA2CU3O7 heterostructures: growth, properties, and device applications

Arun Inam

doi:10.1117/12.2321826

1 March 1992 Artificially layered YBA2CU3O7-PRBA2CU3O7 heterostructures: growth, properties, and device applications

Arun Inam

Proceedings Volume 1597, Progress in High-Temperature Superconducting Transistors and Other Devices II; (1992) https://doi.org/10.1117/12.2321826
Event: Microelectronic Processing Integration, 1991, San Jose, CA, United States

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.

Citation Download Citation

Arun Inam "Artificially layered YBA2CU3O7-PRBA2CU3O7 heterostructures: growth, properties, and device applications", Proc. SPIE 1597, Progress in High-Temperature Superconducting Transistors and Other Devices II, (1 March 1992); https://doi.org/10.1117/12.2321826

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