Synthesis of la1-xMxTiO3 (M = Na, K; 0≤x≤ 0.4) and the electrical properties

Hiroshi Yamamoto, Tomoyuki Tahara, Yoshiyuki Sugahara, Kazuyuki Kuroda, Chuzo Kato

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    5 Citations (Scopus)

    Abstract

    Polycrystalline materials of La1-xMxTiO3(M = Na, K;0≤x≤0.4) were prepared by solid-state reactions under an Ar atmosphere and their electrical properties were investigated as possible candidates for superconducting oxides. XRD analysis showed that the formation of orthorhombic perovskite-type compounds were obtained when × = 0 (LaTiO3) and that pseudo-cubic or cubic phases were obtained when ϗ ≥ 0.1. The lattice constants of the products decreased when × increased, suggesting the formation of solid solutions. There were small deficiencies of the alkali metals. The products in both systems showed semiconductor to metal transitions as temperature decreased when x≥0.1, and striking decreases of resistivity around 25 K were observed in both systems.

    Original languageEnglish
    Pages (from-to)137-141
    Number of pages5
    JournalPhase Transitions
    Volume41
    Issue number1-4
    DOIs
    Publication statusPublished - 1993 Jan 1

    Keywords

    • electrical property
    • perovskite
    • Titanate

    ASJC Scopus subject areas

    • Materials Science(all)
    • Instrumentation

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