Structural variability of edge dislocations in a SrTiO 3 low-angle [001] tilt grain boundary

Using a spherical aberration (Cs)-corrected scanning transmission electron microscopy (STEM) and electron energy-loss spectroscopy (EELS), we investigated a 6° low-angle [001] tilt grain boundary in SrTiO 3 . The enhanced spatial resolution of the aberration corrector leads to the observation of a n...

Full description

Saved in:
Bibliographic Details
Published in:Journal of materials research 2009-07, Vol.24 (7), p.2191-2199
Main Authors: Buban, James P., Chi, Miaofang, Masiel, Daniel J., Bradley, John P., Jiang, Bin, Stahlberg, Henning, Browning, Nigel D.
Format: Article
Language:English
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Using a spherical aberration (Cs)-corrected scanning transmission electron microscopy (STEM) and electron energy-loss spectroscopy (EELS), we investigated a 6° low-angle [001] tilt grain boundary in SrTiO 3 . The enhanced spatial resolution of the aberration corrector leads to the observation of a number of structural variations in the edge dislocations along the grain boundary that neither resemble the standard edge dislocations nor partial dislocations for SrTiO 3 . Although there appear to be many variants in the structure that can be interpreted as compositional effects, three main classes of core structure are found to be prominent. From EELS analysis, these classifications seem to be related to Sr deficiencies, with the final variety of the cores being consistent with an embedded TiO x rocksalt-like structure.
ISSN:0884-2914
2044-5326
DOI:10.1557/jmr.2009.0259