New misfit-layered cobalt oxide (CaOH)1.14CoO2

Mitsuyuki Shizuya, Masaaki Isobe, Yuji Baba, Takuro Nagai, Minoru Osada, Kosuke Kosuda, Satoshi Takenouchi, Yoshio Matsui, Eiji Takayama-Muromachi

研究成果: Article査読

32 被引用数 (Scopus)

抄録

We synthesized a new cobalt oxide (CaOH)1.14CoO2 by utilizing a high-pressure technique. X-ray and electron diffraction studies revealed that the compound has a layered structure that consists of CdI2-type CoO2 layers and rock-salt-type double CaOH atomic layers. The two subcells have incommensurate periodicity along the a-axis, resulting in a misfit-layered structure. From resistivity and Seebeck coefficient measurements, we have shown that the two-dimensional (2-D) variable-range hopping (VRH) regime with hole conduction is dominant at low temperature for this compound. As temperature increases, the conduction mechanism undergoes crossover from the 2-D VRH regime to a thermal activation-energy-type regime.

本文言語English
ページ(範囲)249-259
ページ数11
ジャーナルJournal of Solid State Chemistry
180
1
DOI
出版ステータスPublished - 2007 1
外部発表はい

ASJC Scopus subject areas

  • 無機化学
  • 物理化学および理論化学
  • 材料化学

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