Microstructure and Microwave Properties of Tl sub 2 Ba sub 2 CaCu sub 2 O sub 8 Thin Films on NdGaO sub 3

High-quality epitaxial Tl sub 2 Ba sub 2 CaCu sub 2 O sub 8 superconducting thin films have been grown on NdGaO sub 2 (001) by a two step process. One film, annealed at 850 deg C, shows interdiffusion of Ga by secondary ion mass spectroscopy, resulting in an incomplete ac susceptibility transition a...

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Bibliographic Details
Published in:Japanese Journal of Applied Physics, Letters (Japan) Letters (Japan), 1991-08, Vol.30 (8A), p.L1359-L1362
Main Authors: Young, K H, Negrete, G V, Eddy, M M, Smith, G J
Format: Article
Language:English
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Summary:High-quality epitaxial Tl sub 2 Ba sub 2 CaCu sub 2 O sub 8 superconducting thin films have been grown on NdGaO sub 2 (001) by a two step process. One film, annealed at 850 deg C, shows interdiffusion of Ga by secondary ion mass spectroscopy, resulting in an incomplete ac susceptibility transition at 80K. For films annealed at lower temperature, excellent crystallinity and transport properties were obtained. Ground plane substitution of the film in a 5 GHz microstrip resonator indicated worse microwave performance than similar films on LaAlO sub 3 (001) substrates. The 2.3 GHz resonator made from the film on NdGaO sub 3 gave significantly worse quality factor (Q) values (1850) than those made on LaAlO sub 3 .
ISSN:0021-4922