A study of intermixing in perovskite superlattices by simulation-supported cs-corrected HAADF-STEM
✍ Scribed by Hillebrand, Reinald ;Pippel, Eckhard ;Hesse, Dietrich ;Vrejoiu, Ionela
- Book ID
- 105366536
- Publisher
- John Wiley and Sons
- Year
- 2011
- Tongue
- English
- Weight
- 850 KB
- Volume
- 208
- Category
- Article
- ISSN
- 0031-8965
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✦ Synopsis
Abstract
In this paper, we present and interpret high‐angle annular dark field scanning transmission electron microscopy (HAADF‐STEM) images of La~0.7~Sr~0.3~MnO~3~/SrRuO~3~ 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.
magnified image
Coloured HAADF‐STEM image (V = 300 kV, c~s~ = 0) of a La~0.7~Sr~0.3~MnO~3~/SrRuO~3~ layer structure.