An x-ray diffraction and electron microscopic study of a new high-Tcsuperconductor based on the Bi-Ca-Sr-Cu-O system

Yasuhiko Syono, Kenji Hiraga, Norio Kobayashi, Masae Kikuchi, Keiji Kusaba, Tsuyoshi Kajitani, Daisuke Shindo, Syoichi Hosoya, Ayako Tokiwa, Shoji Terada, Yoshio Muto

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53 Citations (Scopus)

Abstract

Observed high-resolution images of a new high-Tcsuperconductor based on the Bi-Ca-Sr-Cu-O system (Tcabove 70 K) indicated a structure derived from the Bi4Ti3O12type in whichdoubled bismuth oxide layers alternate with double perovskite layers along the c-axis. The orthorhombic unit cell dimensions showed an approximate relation of a=√2apb=5√2apand c=8apwhere ap=3.82 Å, the cell parameter of a cubic perovskite. At least a quarter of the oxygen should be deleted in accordance with the average copper valence of less than 3 and two-dimensional Cu-O layers are supposed to be responsible for the high-Tcsuperconductivity.

Original languageEnglish
Pages (from-to)L569-L572
JournalJapanese Journal of Applied Physics
Volume27
Issue number4A
DOIs
Publication statusPublished - 1988 Apr
Externally publishedYes

Keywords

  • Bi-Ca-Sr-Cu-O system
  • Crystal structure
  • Electron microscopy
  • High-T
  • Oxide superconductor
  • Superconductivity
  • X-ray diffraction

ASJC Scopus subject areas

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

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