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Superconducting Phases and Modulated Structures in (Bi, Pb)-Sr-Ca-Cu-O Wires

Published online by Cambridge University Press:  28 February 2011

Y. Feng
Affiliation:
Superconductivity Research Group, and School of Metallurgy and Materials, University of Birmingham, P. O. Box 363, Birmingham B15 2TT, UNITED KINGDOM
R. E. Smallman
Affiliation:
Superconductivity Research Group, and School of Metallurgy and Materials, University of Birmingham, P. O. Box 363, Birmingham B15 2TT, UNITED KINGDOM
I. P. Jones
Affiliation:
Superconductivity Research Group, and School of Metallurgy and Materials, University of Birmingham, P. O. Box 363, Birmingham B15 2TT, UNITED KINGDOM
F. Wellhofer
Affiliation:
Superconductivity Research Group, and School of Metallurgy and Materials, University of Birmingham, P. O. Box 363, Birmingham B15 2TT, UNITED KINGDOM
N. Mcn. Alford
Affiliation:
ICI Advanced Materials, Runcorn, Cheshire WA7 4QE, UNITED KINGDOM.
T. W. Button
Affiliation:
ICI Advanced Materials, Runcorn, Cheshire WA7 4QE, UNITED KINGDOM.
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Abstract

(Bi, Pb)-Sr-Ca-Cu-O ‘2223’ wires with varying Bi/Pb ratios and sinter times have been investigated by parallel physical measurements and analytical electron microscopy. The numbers of phases present, their relative amounts, compositions and structures are reported and correlated with the superconducting properties. In particular, the recently reported long period (010) modulation (2b*/q*=7.7) is found to be connected with the “2223” high Tc phase.

Type
Research Article
Copyright
Copyright © Materials Research Society 1990

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