Structural and Morphological Changes Associated with Charge Ordering in La0.2Ca0.8MnO3

Y. Murakami, D. Shindo, H. Chiba, M. Kikuchi, Y. Syono

研究成果: ジャーナルへの寄稿学術誌査読

12 被引用数 (Scopus)

抄録

Both structural and morphological changes associated with charge ordering in perovskite manganese oxide, La0.2Ca0.8MnO3, were studied by electron microscopic observations with imaging plates. Two types of long-period structures were observed at around 107 K, i.e., the structure with about 4-fold periodicity to the unit lattice distance of the room-temperature phase and the structure with much larger periodicity such as 23-fold. These long-period structures were suggested to be formed by a similar mechanism due to charge ordering of manganese ions, since they showed some crystallographic and morphological similarities. Superlattice reflections of a near 4-fold structure were observed as a function of temperature. They were found to become weak diffuse scattering just before the disappearance, and the peak positions moved slightly with heating. Considering those features, the kinetics of the charge ordering in this oxide was discussed.

本文言語英語
ページ(範囲)331-336
ページ数6
ジャーナルJournal of Solid State Chemistry
140
2
DOI
出版ステータス出版済み - 11月 1 1998
外部発表はい

!!!All Science Journal Classification (ASJC) codes

  • 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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