Synthesis and structures of carrier doped titanates with the Ruddlesden-Popper structure (Sr0.95La0.05)n+1TinO3n+1 (n = 1, 2)

Wataru Sugimoto, Masashi Shirata, Masataka Takemoto, Shuhei Hayami, Yoshiyuki Sugahara, Kazuyuki Kuroda*

*この研究の対応する著者

研究成果: Article査読

15 被引用数 (Scopus)

抄録

Carrier doping in Srn+1TinO3n+1 (n = 1, 2) was conducted by the substitution of La for Sr and the simultaneous introduction of oxygen vacancies. Single-phase products of (Sr0.95La0.05)n+1TinO 3n+1-δ (n = 1, δ = 0.05; n =2, δ = 0.125) were synthesized by the solid-state reaction of Sr2TiO4 (or Sr3Ti2O7), La2O3 and Ti. When TiO2 was used as one of the starting compounds to maintain oxygen stoichiometry, compounds with higher n were observed besides the object phases. Structural refinement by Rietveld analysis revealed that the a-axis expands while the c-axis contracts with La doping. The contraction of the c-axis is attributed to a shortened (Sr,La)-O distance, since the TiO6 octahedra elongated in both a and c directions with doping. The change in the structure is discussed on the basis of the size of the substituting ion. The resistivity of the single-phase products was semiconducting with a very weak temperature dependence down to 80 K.

本文言語English
ページ(範囲)315-319
ページ数5
ジャーナルSolid State Ionics
108
1-4
DOI
出版ステータスPublished - 1998 5 1

ASJC Scopus subject areas

  • 化学 (全般)
  • 材料科学(全般)
  • 凝縮系物理学

フィンガープリント

「Synthesis and structures of carrier doped titanates with the Ruddlesden-Popper structure (Sr<sub>0.95</sub>La<sub>0.05</sub>)<sub>n+1</sub>Ti<sub>n</sub>O<sub>3n+1</sub> (n = 1, 2)」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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