Discommensuration of doped [Ca 2CoO 3] p CoO 2

Tsuyoshi Kajitani, Kunio Yubuta, Xiangyang Huang, Yuzuru Miyazaki

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

Single-crystal x-ray diffraction and high-resolution electron microscopy studies were carried out for Co-121 ([Ca 2CoO 3] p CoO 2) and Sr-doped Co-121 grown in a KCl flux at 810°C. Typically, the samples were 2 mm × 2 mm × 0.02 mm in size. The single-crystal diffraction intensities were measured by the use of a four-circle diffractometer. Twinned super reflections, e.g., 010\bar{1}/0\bar{2}04 and 020\bar{2}/0\bar{1}03 were observed in the electron diffraction patterns. These super reflections were not observed in the end-member. Diffuse scattering was observed in the same reciprocal space by the single-crystal x-ray diffraction study. A discommensurate crystal model is proposed for the Sr-doped system.

Original languageEnglish
Pages (from-to)1462-1467
Number of pages6
JournalJournal of Electronic Materials
Volume38
Issue number7
DOIs
Publication statusPublished - 2009 Jul

Keywords

  • Ca349
  • Discommensuration
  • HREM
  • Single crystal
  • X-ray diffraction

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering
  • Materials Chemistry

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