Neutron powder diffraction study of Pb2Sr2YCu3O8, the prototype of a new family of superconductors

Robert Joseph Cava, M. Marezio, J. J. Krajewski, W. F. Peck, A. Santoro, F. Beech

Research output: Contribution to journalArticle

119 Scopus citations

Abstract

The structure of Pb2Sr2YCu3O8 has been analyzed with powder neutron diffraction techniques and profile analysis. The results of this study confirm the general structural features determined by X-ray single-crystal methods. The material has pseudo tetragonal symmetry, but is orthorhombic, space group Cmmm with lattice parameters a=5.3933(2), b=5.4311(2), and c=15.7334(6)Å. The orthorhombic distortion is caused by the disordering in the ab plane of the oxygen atoms of the PbO layers over the general position of the space group, with x=0.275(5) and y=0.402(5) Å. The structure of this compound can be derived from that of YBa2Cu3O6 by substituting the Cu layers with blocks of ... PbO.Cu.PbO... . Of the two Cu atoms in the asymmetric unit, one has two fold coordination while the other has five fold pyramidal coordination with the apex elongated along the c-axis.

Original languageEnglish (US)
Pages (from-to)272-278
Number of pages7
JournalPhysica C: Superconductivity and its applications
Volume157
Issue number2
DOIs
StatePublished - Feb 1 1989
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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