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Atomic structure of a Ca-doped [001] tilt grain boundary in MgO

被引：14
作者：
Yan, Y
Chisholm, MF
Duscher, G
Pennycook, SJ
机构：
[1] Oak Ridge Natl Lab, Div Solid State, Oak Ridge, TN 37831 USA
[2] Univ Illinois, Dept Phys, Chicago, IL 60607 USA
来源：
JOURNAL OF ELECTRON MICROSCOPY | 1998年 / 47卷 / 02期
关键词：
Z-contrast; EELS; STEM; grain boundary; MgO;
D O I：
10.1093/oxfordjournals.jmicro.a023567
中图分类号：
TH742 [显微镜];
学科分类号：
摘要：
The atomic structure of a symmetric 24 degrees[001] tilt grain boundary in MgO has been derived directly from high-resolution Z-contrast images obtained in a scanning transmission electron microscope. The images indicate the presence of impurities (Z>12) and vacancies at the boundary. High spatial resolution electron energy-loss spectroscopy has been used to determine that the segregated impurity is Ca. The specific sites occupied by Ca are obtained from the image and bond valence sum analysis.
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收藏
页码：115 / 120
页数：6
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