DIRECT DETERMINATION OF GRAIN-BOUNDARY ATOMIC-STRUCTURE IN SRTIO3

被引：162

作者：

MCGIBBON, MM ^{[1
]}

BROWNING, ND ^{[1
]}

CHISHOLM, MF ^{[1
]}

MCGIBBON, AJ ^{[1
]}

PENNYCOOK, SJ ^{[1
]}

RAVIKUMAR, V ^{[1
]}

DRAVID, VP ^{[1
]}

机构：

[1] NORTHWESTERN UNIV,DEPT MAT SCI & ENGN,EVANSTON,IL 60208

来源：

SCIENCE | 1994年 / 266卷 / 5182期

关键词：

D O I：

10.1126/science.266.5182.102

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：

An atomic structure model for a 25 degrees [001] symmetric tilt grain boundary in SrTiO3 has been determined directly from experimental data with the use of high-resolution Z-contrast imaging coupled with electron energy loss spectroscopy. The derived model of the grain boundary was refined by bond-valence sum calculations and reveals candidate sites for dopant atoms in the boundary plane. These results show how the combined techniques can be used to deduce the atomic structure of defects and interfaces without recourse to preconceived structural models or image simulations.

引用

页码：102 / 104

页数：3

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