Artificially layered YBa2Cu3O7-PrBa2Cu3O7 heterostructures; growth, properties, and device applications (Invited Paper)
| Publication Type | Conference Paper
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| Abstract |
We have investigated the influence of interface effects and CuO2 plane orientation on transport properties of high temperature superconducting (HTS) thin films in YBa2 Cu3O7-PrBa2Cu3O7 (YBCO-PrBCO) heterostructures grown by pulsed laser deposition. Two unit cell (≈ 24 angstroms) 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 YBCO/PrBCO 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. |
| Notes |
cited By 0 |
| Conference Name |
Proceedings of SPIE - The International Society for Optical Engineering
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| Volume |
1597
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| Year of Publication |
1992
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| Pagination |
101-107
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| Publisher |
Publ by Int Soc for Optical Engineering, Bellingham, WA, United States
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| ISSN Number |
0277786X
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| ISBN Number |
0819407283
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