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- Title
Atomic-resolution measurement of oxygen concentration in oxide materials.
- Authors
Jia, C L; Urban, K
- Abstract
Using high-resolution imaging at negative spherical aberration of the objective lens in an aberration-corrected transmission electron microscope, we measure the concentration of oxygen in Sigma3[111] twin boundaries in BaTiO3 thin films at atomic resolution. On average, 68% of the boundary oxygen sites are occupied, and the others are left vacant. The modified Ti2O9 group unit thus formed reduces the grain boundary energy and provides a way of accommodating oxygen vacancies occurring in oxygen-deficient material by the formation of a nanotwin lamellae structure. The atomically resolved measurement technique offers the potential for studies on oxide materials in which the electronic properties sensitively depend on the local oxygen content.
- Publication
Science (New York, N.Y.), 2004, Vol 303, Issue 5666, p2001
- ISSN
1095-9203
- Publication type
Journal Article
- DOI
10.1126/science.1093617