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An electron diffraction study of Bi2Sr2(GdxCa1−x)0.8Cu2O8+δ

Published online by Cambridge University Press:  31 January 2011

J. Kulik ,
Y. Y. Xue ,
Y. Y. Sun  and
M. Bonvalot
J. Kulik
Affiliation:
Texas Center for Superconductivity, University of Houston, Houston, Texas 77204
Y. Y. Xue
Affiliation:
Texas Center for Superconductivity, University of Houston, Houston, Texas 77204
Y. Y. Sun
Affiliation:
Texas Center for Superconductivity, University of Houston, Houston, Texas 77204
M. Bonvalot
Affiliation:
Texas Center for Superconductivity, University of Houston, Houston, Texas 77204
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Abstract

The compound Bi2Sr2(GdxCa1−x)0.8Cu2O8+δ is examined by electron diffraction for several values of x. The incommensurate modulation which has been reported for x - 0 persists for all values of x with the wave vector increasing as x increases. A secondary modulation with a wave vector equal to one-half that of the primary is observed for x  0.85. This modulation manifests itself through satellite reflections that are highly streaked normal to the (001) planes and that flank certain select positions in reciprocal space. The appearance of this secondary modulation is accompanied by a change in the average crystal structure from B-centered to F-centered orthorhombic.

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Articles
Information
Journal of Materials Research , Volume 5 , Issue 8 , August 1990 , pp. 1625 - 1638
Copyright
Copyright © Materials Research Society 1990

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References

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