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A study of intermixing in perovskite superlattices by simulation‐supported c s ‐corrected HAADF‐STEM
Author(s) -
Hillebrand Reinald,
Pippel Eckhard,
Hesse Dietrich,
Vrejoiu Ionela
Publication year - 2011
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201127120
Subject(s) - superlattice , scanning transmission electron microscopy , dark field microscopy , materials science , perovskite (structure) , transmission electron microscopy , image (mathematics) , diffraction , image contrast , condensed matter physics , optics , crystallography , physics , microscopy , optoelectronics , nanotechnology , chemistry , computer science , artificial intelligence
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.Coloured HAADF‐STEM image ( V = 300 kV, c s = 0) of a La 0.7 Sr 0.3 MnO 3 /SrRuO 3 layer structure.