Atomic-resolution measurement of oxygen concentration in oxide materials

被引：243

作者：

Jia, CL ^{[1
]}

Urban, K ^{[1
]}

机构：

[1] Forschungszentrum Julich, Inst Solid State Res, D-52425 Julich, Germany

来源：

SCIENCE | 2004年 / 303卷 / 5666期

关键词：

D O I：

10.1126/science.1093617

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

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 BaTiO(3) thin films at atomic resolution. On average, 68% of the boundary oxygen sites are occupied, and the others are left vacant. The modified Ti(2)O(9) 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.

引用

页码：2001 / 2004

页数：4

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