Nonstoichiometry and mixed pr valency in (pr1-xsrx)(pr1-ycey)cuo4-z

Hijiri Kito, Hiroshi Sawa, Jun Akimitsu, Fujio Izumi, Tōru Ishigaki, Hajime Asano

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The structural parameters of a nonsuperconductor (Pr0.6Sr0.4)(Pr0.75Ce0.25)CuO4-z(z=0.012) were refined by the Rietveld analysis of TOF neutron powder diffraction data. It is isomorphous with a superconductor (Nd1-xSrx)(Nd1-yCey)CuO4-zand consists of K2NiF4- and Nd2CuO4-type units stacked alternately along the c-axis. An apical oxygen site in the K2NiF4unit is 1.2% deficient. Pr atoms in the Nd2CuO4unit are, at least partially, in the oxidation state +4. The origin of nonsuperconductivity in this compound is discussed from a crystal chemical point of view.

Original languageEnglish
Pages (from-to)L1803-L1806
JournalJapanese Journal of Applied Physics
Volume29
Issue number10
DOIs
Publication statusPublished - Oct 1990
Externally publishedYes

Keywords

  • (PrSr)(PrCe)CuO
  • Mixed valency
  • Neutron powder diffraction
  • Nonstoichiometry
  • Rietveld analysis

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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