Sr vacancy segregation by heat treatment at SrTiO3 grain boundary

Teruyasu Mizoguchi, Yukio Sato, James P. Buban, Katsuyuki Matsunaga, Takahisa Yamamoto, Yuichi Ikuhara

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    Abstract

    Electron energy loss near-edge structures (ELNES) and first-principles band structure calculations were combined in order to identify native defects which are segregated by heat treatments at the vicinity of SrTiO3 grain boundary (GB). Spectral differences between the bulk and the vicinity of GB mainly appear around the second peak of O K ELNES. The spectral differences can be reproduced by calculating the theoretical O K ELNES from the first-nearest-neighbor oxygen to a Sr vacancy. It is therefore concluded that the Sr vacancies are concentrated in the vicinity of GB by the heat treatment.

    Original languageEnglish
    Article number241920
    Pages (from-to)1-3
    Number of pages3
    JournalApplied Physics Letters
    Volume87
    Issue number24
    DOIs
    Publication statusPublished - 2005 Dec 19

    ASJC Scopus subject areas

    • Physics and Astronomy (miscellaneous)

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  • Cite this

    Mizoguchi, T., Sato, Y., Buban, J. P., Matsunaga, K., Yamamoto, T., & Ikuhara, Y. (2005). Sr vacancy segregation by heat treatment at SrTiO3 grain boundary. Applied Physics Letters, 87(24), 1-3. [241920]. https://doi.org/10.1063/1.2146051