Analytical electron microscopic study of high-Tc superconductor Bi-Ca-Sr-Cu-O

Daisuke Shindo, Kenji Hiraga, Makoto Hirabayashi, Norio Kobayashi, Masae Kikuchi, Keiji Kusaba, Yasuhiko Syono, Yoshio Muto

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10 Citations (Scopus)

Abstract

Superconductors Bi-Ca-Sr-Cu-O containing high-Tc (110 K) and/or low-Tc (80 K) phases were investigated by analytical electron microscopy. In the sample containing the high-Tc phase, various stacking sequences formed with 2, 3 and 4 perovskite layers were observed by a lattice imaging technique. From EDX analysis, a considerable variation of composition with a higher Cu atomic fraction than that of low-Tc phase was detected. The structure of 3 perovskite layers is considered to be responsible for a superconducting transition at 110 K. A discrepancy between a volume fraction of the structure containing 3 perovskite layers and that of high-Tc phase expected from the magnetization experiment is discussed. Despite the differences of chemical composition and stacking period along the c-axis, a similar structural modulation with an incommensurate period along the b-axis was equally found in the high-Tc phase as the low-Tc phase.

Original languageEnglish
Pages (from-to)L2048-L2051
JournalJapanese journal of applied physics
Volume27
Issue number11 A
DOIs
Publication statusPublished - 1988 Nov

Keywords

  • Analytical electron microscopy
  • Bi-Ca-Sr-Cu-O
  • Electron diffraction study
  • High-Tphase
  • High-Tsuperconductor
  • Lattice image
  • Low-Tphase

ASJC Scopus subject areas

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

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    Shindo, D., Hiraga, K., Hirabayashi, M., Kobayashi, N., Kikuchi, M., Kusaba, K., Syono, Y., & Muto, Y. (1988). Analytical electron microscopic study of high-Tc superconductor Bi-Ca-Sr-Cu-O. Japanese journal of applied physics, 27(11 A), L2048-L2051. https://doi.org/10.1143/JJAP.27.L2048