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Issues Concerning the Chemical Synthesis of Ceramic Superconducting Coatings in the Bi-Sr-Ca-Cu-O System with High Critical Current Densities.

Published online by Cambridge University Press:  25 February 2011

S. J. Golden ,
K. J. Vaidya ,
T. E. Bloomer ,
F. F. Lange  and
D. R. Clarke
S. J. Golden
Affiliation:
Department of Materials, University of California, Santa Barbara, CA 93106
K. J. Vaidya
Affiliation:
Department of Materials, University of California, Santa Barbara, CA 93106
T. E. Bloomer
Affiliation:
Department of Materials, University of California, Santa Barbara, CA 93106
F. F. Lange
Affiliation:
Department of Materials, University of California, Santa Barbara, CA 93106
D. R. Clarke
Affiliation:
Department of Materials, University of California, Santa Barbara, CA 93106
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Abstract

Superconducting thin films of the two Cu-layer phase in the Pb-doped Bi- Sr-Ca-Cu-O system have been fabricated on {100} LaAlO3 single crystals by the metalorganic deposition (MOD) from ethyl hexanoate precursors. Some of the major issues pertinent to the synthesis of high quality films have been studied.

Thin films of composition Bi1.8Pb0.3Sr1.6CaCu2Ox given heat treatments in air at 850–860 °C for several hours had sharp resistive transitions with a Tc of 85–89 K. The zero-field transport critical current densities were in the range of 1–4×105 A.cm−2 at 77 K and 106 A.cm−2 at 45 K in 200–300 nm thick films. In contrast to caxis oriented films grown on (100) MgO, X-ray pole figures show that the polycrystalline films grown on (100) LaAlO3 are epitaxial, a result confirmed by electron channeling patterns.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 249: Symposium Q – Synthesis and Processing of Ceramics: Scientific Issues , 1991 , 183
Copyright
Copyright © Materials Research Society 1992

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References

REFERENCES

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