Structure analysis of high-tcsuperconductor bi-ca-sr-cu-o by processing of high-resolution electron microscope images

Daisuke Shindo, Kenji Hiraga, Makoto Hirabayashi, Masae Kikuchi, Yasuhiko Syono

Research output: Contribution to journalArticle

43 Citations (Scopus)

Abstract

A modulated structure in Bi-Ca-Sr-Cu-O was analyzed by image processing of high-resolution electron micrographs. The contrast of the modulated structure along the [010] direction with about 5a period was strongly enhanced by the processing. The structural modulation, mainly caused by the displacements of Bi atoms due to oxygen vacancies in the Bi4>Ti3>O12>derivative structure was clearly revealed. By combining the above result with processed images in other orientations, a realistic model of the modulated structure is proposed. It is demonstrated that the processing of high resolution images is useful in analyzing the complicated modulated structures such as observed in the new high-Tc>superconductor Bi-Ca-Sr-Cu-O.

Original languageEnglish
Pages (from-to)L1018-L1021
JournalJapanese journal of applied physics
Volume27
Issue number6A
DOIs
Publication statusPublished - 1988 Jun

Keywords

  • Bi-Ca-Sr-Cu-O
  • High-Tc superconductor
  • High-resolution electron microscopy
  • Image processing
  • Incommensurate structure
  • Oxygen vacancy

ASJC Scopus subject areas

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

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