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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42 Citations (Scopus)

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 - Dec 19 2005
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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