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Philosophical Magazine Letters Volume 58, 1988 - Issue 3
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Original Articles

Superlattices and stacking faults in Bi2(Sr, Ca)3Cu2O8+y

N. X. Tan School of Materials Science and Engineering, University of New South Wales, P.O. Box 1, Kensington, New South Wales, 2033, Australia
,
A. J. Bourdillon School of Materials Science and Engineering, University of New South Wales, P.O. Box 1, Kensington, New South Wales, 2033, Australia
,
S. X. Dou Northeast University of Technology, Shenyang, P.R. China
,
H. K. Liu Northeast University of Technology, Shenyang, P.R. China
&
C. C. Sorrell School of Materials Science and Engineering, University of New South Wales, P.O. Box 1, Kensington, New South Wales, 2033, Australia
Pages 149-156 | Received 07 Jun 1988, Accepted 21 Jun 1988, Published online: 20 Aug 2006
 
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Abstract

Two-dimensional {110} superlattices have been observed in Bi2(Sr, Ca)3Cu2O8+y by transmission electron microscopy from (001) and (110) planes but not from the (100) plane. Lattice images in the (110) plane show stacking faults intersecting the superlattice. It is possible that the existence of superlattices and stacking faults is important in the formation of Cooper pairs for superconductivity, and that ordered multiphase layered assemblages can be used to produce material of higher T c. Comparisons of ionic radii in a similar material, Tl2Ba2CaCu2O8+y, suggest that the superlattice results from periodic lattice strain modulation.

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