Direct observation of the double Schottky barrier in niobium-doped barium titanate by the charge-collection current method

Noriyasu Kataoka, Katsuro Hayashi, Takahisa Yamamoto, Yoshihiro Sugawara, Yuichi Ikuhara, Taketo Sakuma

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Charge-collection (CC) current was measured at a single grain boundary, which exhibited positive temperature coefficient of resistivity (PTCR) effects, in 0.1-mol%-Nb-doped BaTiO 3. The CC current systematically reversed across the grain boundary above the Curie point, which indicated the presence of a double Schottky barrier (DSB) at the grain boundary. In contrast, the CC current was constant across the grain boundary below the Curie temperature. The result obtained from the CC current measurement agrees with the classical DSB model in donordoped BaTiO 3, indicating the PTCR effects.

Original languageEnglish
Pages (from-to)1961-1963
Number of pages3
JournalJournal of the American Ceramic Society
Issue number7
Publication statusPublished - Jul 1 1998
Externally publishedYes


All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry

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