Cation ordering in the perovskite-type Sr2-xLaxCo1-yTa1+yO6

Sumio Kato, Tatsuhiro Kawase, Yozo Ohshima, Mikio Sugai, Hirotsugu Takizawa, Tadashi Endo

研究成果: Article査読

2 被引用数 (Scopus)

抄録

Perovskite-related solid solutions, Sr2-xLaxCu1-yTa1+yOz, were synthesized by solid-state reaction at 1200°C in air. The crystalline phases were identified by powder X-ray diffraction. The perovskite-type solid solutions with different ordering types were observed including simple cubic perovskite-type (random), the Ba(Sr1/3Ta2/3)O3-type (1:2 ordering) and the (NH4)3FeF6-type (1:1 ordering). The 1:2 ordering phase formed near the Sr2(Co0.67Ta1.33)O6 composition. In the composition range, 0≤y≤0.2, the random and the 1:1 ordered phases formed. In the higher La3+ content region, the 1:1 ordering phase was observed. The valency state of Co decreased with increasing La3+ content and the perovskite cell expanded resulting from the increase of the average ionic radii on (Co,Ta) site The 1:1 ordering of the ions on the octahedral site was found to be affected by the size difference of the ions more than the charge difference in this system.

本文言語English
ページ(範囲)64-68
ページ数5
ジャーナルJournal of Alloys and Compounds
285
1-2 Complete
DOI
出版ステータスPublished - 1999 6 30

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

フィンガープリント 「Cation ordering in the perovskite-type Sr<sub>2-x</sub>La<sub>x</sub>Co<sub>1-y</sub>Ta<sub>1+y</sub>O<sub>6</sub>」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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