Superconductor technology: apparatus – material – process – High temperature devices – systems – apparatus – com- ponents,... – Josephson junction – per se or josephson junction with only...
Patent
1993-05-19
1994-06-28
Hiller, Rolf
Superconductor technology: apparatus, material, process
High temperature devices, systems, apparatus, com- ponents,...
Josephson junction, per se or josephson junction with only...
365145, 257 33, 257 35, 505237, H01L 3922, H01G 410, H01B 1200
Patent
active
053247140
ABSTRACT:
A method, and the resulting structure, of growing a superconducting perovskite thin film of, for example, YBa.sub.2 Cu.sub.3 O.sub.7-x. A buffer layer of, for example, the perovskite PrBa.sub.2 Cu.sub.3 O.sub.7-y, is grown on a crystalline (001) substrate under conditions which favor growth of a,b-axis oriented material. Then the YBa.sub.2 Cu.sub.3 O.sub.7-x layer is deposited on the buffer layer under changed growth conditions that favor growth of c-axis oriented material on the substrate, for example, the substrate temperature is raised by 110.degree. C. However, the buffer layer acts as a template that forces the growth of a,b-axis YBa.sub.2 Cu.sub.3 O.sub.7-x, which nonetheless shows a superconducting transition temperature near that of c-axis oriented films.
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Inam Arun
Ramesh Ramamoorthy
Rogers, Jr. Charles T.
Bell Communications Research Inc.
Falk James W.
Hiller Rolf
Saadat Mahshid
Suchyta Leonard Charles
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