Metal atom stoichiometry in the electron doped superconductor (Nd,Ce)2CuO4

R. J. Cava, H. Takagi, R. M. Fleming, J. J. Krajewski, W. F. Peck, P. Bordet, M. Marezio, B. Batlogg, L. W. Rupp

Research output: Contribution to journalArticle

28 Scopus citations

Abstract

Through careful material synthesis and powder X-ray diffraction characterization it is shown that (1) there are no significant metal atom nonstoichiometries in the superconducting T' structure phase in the Nd-Ce-Cu-O system which allow it to deviate from the line of composition Nd2-xCexCuO4-δ when synthesised under optimal conditions, and (2) to a very high resolution, the Nd2-xCexCuO4-δ T' phase is a true chemical solid solution, with no composition regions of phase separation, over the range of Ce doping relevant to physical property characterization, 0≤x≤0.175. High resolution diffraction measurements reveal a subtle distribution of average c-axis lengths for Nd1.85Ce0.15CuO4-δ not present for other compositions in the solid solution.

Original languageEnglish (US)
Pages (from-to)65-72
Number of pages8
JournalPhysica C: Superconductivity and its applications
Volume199
Issue number1-2
DOIs
StatePublished - Aug 15 1992
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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