Changes in modulation period of Bi2Sr2 (Ca1-xNdx) Cu2Oa + δ and their relations to oxygen content

Takashi Onozuka, Ayako Tokiwa, Yasuhiko Syono, Yoji Koike, Yoshitami Saito

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Structural changes of long-period modulated structure (LPMS) of the Bi2Sr2(Ca1-xNdx) Cu2Oa + δ ceramics with x are investigated by means of electron diffraction. Increasing x, the modulation mode of the mixing of domains of two modulation periods with b=4.5bo and b=5bo changes to that with b=4.5bo and b=4bo through the modulation mode with only b=4.5bo at x=0.4-0.5. The wavenumber of the superlattice reflection shows a stepwise increase rather than a linear increase with x. Excess oxygen in a LPMS model with the site of excess oxygen is shown to be consistent with excess oxygen analyzed chemically by iodometry and its change with x.

Original languageEnglish
Pages (from-to)885-886
Number of pages2
JournalPhysica C: Superconductivity and its applications
Volume185-189
Issue numberPART 2
DOIs
Publication statusPublished - 1991 Dec 1

ASJC Scopus subject areas

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

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