Electron transport behaviors across single grain boundaries in n-type BaTiO3, SrTiO3 and ZnO

Takahisa Yamamoto, Yukio Sato, Tomohito Tanaka, Katsuro Hayashi, Yuichi Ikuhara, Taketo Sakuma

    Research output: Contribution to journalArticlepeer-review

    15 Citations (Scopus)

    Abstract

    In some electroceramic materials, their unique electrical properties are due to potential barriers, i.e., double Schottky barriers (DSBs), formed at grain boundaries. So far, some researchers have revealed that the electrical properties of DSB are closely related to grain boundary characters, especially grain boundary coherency. For example, highly coherent boundary does not give PTCR or varistic property, while random types exhibit clear resistivity jump or abrupt current increment. Therefore, a concept of grain boundary design will be required for future device manufacturing, even in bulk materials. But it has not been clarified yet why the electron transport behaviors depend on them. In order to address this question, it is necessary to carry out a systematic experiment focusing on single grain boundaries using well-defined bicrystals. In the present study, we have summarized our studies with a special interest in electron transport behavior across single grain boundaries for n-type BaTiO 3, SrTiO3 and ZnO.

    Original languageEnglish
    Pages (from-to)881-887
    Number of pages7
    JournalJournal of Materials Science
    Volume40
    Issue number4
    DOIs
    Publication statusPublished - 2005 Feb

    ASJC Scopus subject areas

    • Materials Science(all)
    • Mechanics of Materials
    • Mechanical Engineering

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