Synthesis and crystal structure of Pb2Sr2(Ln,Ce)nCu3O6+2n+δ and Pb(Ba,Sr)2(Ln,Ce)nCu3O5+2n+δ (Ln=Y,n=3,4,... and 0≤δ≤2.0), layered structure compounds with multiple fluorite layers

Ayako Tokiwa, Takeo Oku, Masayasu Nagoshi, Yasuhiko Syono

研究成果: Article査読

39 被引用数 (Scopus)

抄録

Pb2Sr2(Ln,Ce)nCu3O6+2n+δ (Pb32n2) and Pb(Ba,Sr)2(Ln,Ce)nCu3O5+2n+δ (Pb22n2) (Ln=Y, n=3, 4, ... and 0≤δ≤2.0) were synthesized and investigated by XPD, HREM, TGA and SEM-EDX. Almost-single phase of Pb2Sr2YCe2Cu3O12+δ (Pb3232) was prepared using a gel-citric acid method, although it was not obtained through a solid state reaction. The crystal structure of Pb32n2 and Pb22n2, which was studied by XPD analysis and HREM, was found to be layered constructed by stacking of (Pb, Cu) triple or double layers and (Ln, Ce) multiple fluorite layers. These compounds showed a phase transition accompanied with oxygen absorption and desorption, similar to Pb3212 and Pb3222. SEM observation and EDX analysis of sintered surface indicated that homogeneous dispersion of CeO2 led the products to intergrowth structure of Pb32n2 and Pb22n2 (n = 3, 4, ...) with multiple fluorite layers.

本文言語English
ページ(範囲)311-319
ページ数9
ジャーナルPhysica C: Superconductivity and its applications
181
4-6
DOI
出版ステータスPublished - 1991 10 10
外部発表はい

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学
  • エネルギー工学および電力技術
  • 電子工学および電気工学

フィンガープリント

「Synthesis and crystal structure of Pb<sub>2</sub>Sr<sub>2</sub>(Ln,Ce)<sub>n</sub>Cu<sub>3</sub>O<sub>6+2n+δ</sub> and Pb(Ba,Sr)<sub>2</sub>(Ln,Ce)<sub>n</sub>Cu<sub>3</sub>O<sub>5+2n+δ</sub> (Ln=Y,n=3,4,... and 0≤δ≤2.0), layered structure compounds with multiple fluorite layers」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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