Structural order and disorder in Co-based layered cuprates CoSr 2(Y,Ce)sCu2O5+2s (s=1-3)

T. Nagai*, V. P.S. Awana, E. Takayama-Muromachi, A. Yamazaki, M. Karppinen, H. Yamauchi, S. K. Malik, W. B. Yelon, Y. Matsui

*この研究の対応する著者

研究成果: Article査読

12 被引用数 (Scopus)

抄録

Crystal structures of a homologous series of Co-based layered cuprates, CoSr2(Y,Ce)sCu2O5+2s (s=1-3), have been investigated by high-resolution electron microscopy (HREM) and electron diffraction (ED) techniques. For all the three phases ED patterns showed double periodicity along a direction parallel to the CoO layers, indicating a regular alternation of two types of CoO4-tetrahedra chains within the layers. Also seen was ordering of the chains along the layer-stacking direction for the s=1 phase (Co-1212); ED patterns simulated based on the proposed superstructure model well reproduced the observed patterns. For the s=2 (Co-1222) and s=3 (Co-1232) phases in which an additional fluorite-type layer-block is inserted between two CuO2 planes, HREM and ED analysis revealed complete disorder of the CoO4 chains along the layer-stacking direction. This implies that the interlayer ordering is mainly controlled by the distance between the neighboring CoO layers.

本文言語English
ページ(範囲)213-220
ページ数8
ジャーナルJournal of Solid State Chemistry
176
1
DOI
出版ステータスPublished - 2003 11 15

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • セラミックおよび複合材料
  • 凝縮系物理学
  • 物理化学および理論化学
  • 無機化学
  • 材料化学

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「Structural order and disorder in Co-based layered cuprates CoSr <sub>2</sub>(Y,Ce)<sub>s</sub>Cu<sub>2</sub>O<sub>5+2s</sub> (s=1-3)」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

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