Superconductor technology: apparatus – material – process – High temperature devices – systems – apparatus – com- ponents,... – Superconductor next to two or more nonsuperconductive layers
Patent
1995-01-09
2000-09-12
Yamnitzky, Marie
Superconductor technology: apparatus, material, process
High temperature devices, systems, apparatus, com- ponents,...
Superconductor next to two or more nonsuperconductive layers
505238, 505239, 505210, 505701, 505703, 505704, 505866, 333 99S, 428701, 428702, 428930, H01B 1200, H01L 3900
Patent
active
061178241
ABSTRACT:
A lanthanum aluminate (LaAlO.sub.3) substrate on which thin films of layered perovskite copper oxide superconductors are formed. Lanthanum aluminate, with a pseudo-cubic perovskite crystal structure, has a crystal structure and lattice constant that closely match the crystal structures and lattice constants of the layered perovskite superconductors. Therefore, it promotes epitaxial film growth of the superconductors, with the crystals being oriented in the proper direction for good superconductive electrical properties, such as a high critical current density. In addition, LaAlO.sub.3 has good high frequency properties, such as a low loss tangent and low dielectric constant at superconductive temperatures. Finally, lanthanum aluminate does not significantly interact with the superconductors. Lanthanum aluminate can also used to form thin insulating films between the superconductor layers, which allows for the fabrication of a wide variety of superconductor circuit elements.
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Takemoto, J.H., "Microstrip Resonators and Filters Using High-TC Super
Lee Alfred Euinam
Lee Gregory Steven
Platt Christine Elizabeth
Simon Randy Wayne
TRW Inc.
Yamnitzky Marie
Yatsko Michael S.
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