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Structure determination of the new high-temperature superconductor Y2Ba4Cu7O14+x

Nature volume 334, pages 596–598 (1988)Cite this article

Abstract

A new superconducting phase has been identified during measurements of the pressure–temperature–composition phase diagram of the pseudobinary system YBa2Cu3O6+x–O2 (ref. 1). The new phase has formula unit Y2Ba4Cu7O14+x. Preliminary crystallographic results from electron diffraction showed a doubling of the c-axis1. Here we report the results of a single-crystal X-ray structural study and measurements of superconductivity in the new compound. The superconducting onset, from a.c. susceptibility measurements, is ˜40 K. The structure (space group Ammm) consists of single YBa2Cu3O6+x -type blocks containing single corner-sharing CuO4 square-planar chains, alternating with single YBa2Cu4O8-type blocks containing double edge-sharing CuO4 square-planar chains. This suggests the possibility of similar compounds with other ordered sequences of single and double chains.

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Authors and Affiliations

  1. Laboratoire de Cristallographie CNRS, associé à I'Université J. Fourier, 166X 38042, Grenoble Cedex, France

    P. Bordet, C. Chaillout, J. Chenavas, J. L. Hodeau & M. Marezio

  2. Laboratorium für Festkörperphysik ETH, 8093, Zürich, Switzerland

    J. Karpinski & E. Kaldis

  3. Also at AT & T Bell Laboratories, Murray Hill, New Jersey, 07974, USA

    M. Marezio

Authors
  1. P. Bordet
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  2. C. Chaillout
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  3. J. Chenavas
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  4. J. L. Hodeau
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  5. M. Marezio
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  6. J. Karpinski
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  7. E. Kaldis
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Bordet, P., Chaillout, C., Chenavas, J. et al. Structure determination of the new high-temperature superconductor Y2Ba4Cu7O14+x. Nature 334, 596–598 (1988). https://doi.org/10.1038/334596a0

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