Journal
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
Volume 208, Issue 9, Pages 2144-2149Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/pssa.201127120
Keywords
spherical aberration-corrected; HAADF-STEM; image simulation; intermixing; perovskite superlattices
Funding
- German Research Foundation [SFB 762]
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In this paper, we present and interpret high-angle annular dark field scanning transmission electron microscopy (HAADF-STEM) images of La0.7Sr0.3MnO3/SrRuO3 superlattices. The images were taken in a probe-corrected (c(s) = 0) FEI microscope at 300 kV. We developed a simulation-based technique to evaluate possible intermixing at the interfaces via Z-contrast. The experimental and simulated image intensities across the interfaces are directly compared, where the gradients in the models are systematically varied. Different gradients in different sub-lattices at the interfaces can clearly be distinguished by a best fit criterion. [GRAPHICS] (C) 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
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