Current-voltage characteristics of Σ1 boundaries with and without cobalt ions in niobium-doped SrTiO3 bicrystals

Takahisa Yamamoto, Katsuro Hayashi, Yuichi Ikuhara, Taketo Sakuma

研究成果: ジャーナルへの寄稿学術誌査読

14 被引用数 (Scopus)

抄録

Current-voltage (I-V) characteristics across Σ1 boundaries of Nb-doped SrTiO3 bicrystals were investigated with a special interest in the effect of an impurity ion, cobalt. The Σ1 boundary with cobalt ions was fabricated by hot-joining technique after evaporating metallic cobalt onto the (001) plane used for a contact plane. High-resolution transmission electron microscopy (HREM) study associated with X-ray energy dispersive spectroscopy (EDS) revealed that cobalt solved and distributed around the Σ1 boundary which was perfectly joined without any second films. It was found that the Σ1 boundary with cobalt ions exhibited a nonlinear I-V relationship while the Σ1 boundary without cobalt ions showed a linear I-V relationship. This result indicates that the presence of cobalt itself at the boundary can form a potential barrier irrespective of grain boundary coherency.

本文言語英語
ページ(範囲)1527-1529
ページ数3
ジャーナルJournal of the American Ceramic Society
83
6
DOI
出版ステータス出版済み - 1月 1 2000
外部発表はい

!!!All Science Journal Classification (ASJC) codes

  • セラミックおよび複合材料
  • 材料化学

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