Authors
DA Muller, L Fitting Kourkoutis, M Murfitt, JH Song, HY Hwang, J Silcox, N Dellby, OL Krivanek
Publication date
2008/2/22
Journal
Science
Volume
319
Issue
5866
Pages
1073-1076
Publisher
American Association for the Advancement of Science
Description
Using a fifth-order aberration-corrected scanning transmission electron microscope, which provides a factor of 100 increase in signal over an uncorrected instrument, we demonstrated two-dimensional elemental and valence-sensitive imaging at atomic resolution by means of electron energy-loss spectroscopy, with acquisition times of well under a minute (for a 4096-pixel image). Applying this method to the study of a La0.7Sr0.3MnO3/SrTiO3 multilayer, we found an asymmetry between the chemical intermixing on the manganese-titanium and lanthanum-strontium sublattices. The measured changes in the titanium bonding as the local environment changed allowed us to distinguish chemical interdiffusion from imaging artifacts.
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DA Muller, LF Kourkoutis, M Murfitt, JH Song… - Science, 2008