Grain-boundary plane orientation dependence of electrical barriers at Sigma 5 boundaries in SrTiO3
- Authors
- Lee, Sung Bo; Lee, Jong-Heun; Cho, Yoon-Ho; Kim, Doh-Yeon; Sigle, Wilfried; Phillipp, Fritz; van Aken, Peter A.
- Issue Date
- 10월-2008
- Publisher
- PERGAMON-ELSEVIER SCIENCE LTD
- Keywords
- Annealing; Electron energy-loss spectroscopy; Transmission electron microscopy; Strontium titanate; Grain-boundary structure
- Citation
- ACTA MATERIALIA, v.56, no.18, pp.4993 - 4997
- Indexed
- SCIE
SCOPUS
- Journal Title
- ACTA MATERIALIA
- Volume
- 56
- Number
- 18
- Start Page
- 4993
- End Page
- 4997
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/122668
- DOI
- 10.1016/j.actamat.2008.06.019
- ISSN
- 1359-6454
- Abstract
- Dependence of the electrical properties on grain-boundary plane orientation is examined by a combination of high-resolution transmission electron microscopy, impedance spectroscopy, and electron energy-loss spectrometry using two kinds of SrTiO3 Sigma 5 ([100]/36.8 degrees) bicrystalline grain boundaries: symmetric (310) (18.4 degrees/18.4 degrees) and asymmetric (8.4 degrees/28.4 degrees). While the symmetric grain boundary is observed to be straight with the symmetric (310)//(310) plane orientation, the asymmetric grain boundary is faceted into symmetric (310)//(310) and (210)//(210), and asymmetric (100)//(430). Grain-boundary impedance is observed only in the asymmetric grain boundary, and the electron energy-loss spectrometry quantification indicates that the asymmetric (100)//(430) facets are more oxygen-deficient than the symmetric ones. The results suggest that the asymmetric (100)//(430) facets are the most resistive among the three different facets. (C) 2008 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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