Quantitative STEM Imaging of Order-Disorder Phenomena in Double Perovskite Thin Films.
Using aberration-corrected high-angle annular dark field scanning transmission electron microscopy (HAADF-STEM), we investigate ordering phenomena in epitaxial thin films of the double perovskite Sr_{2}CrReO_{6}. Experimental and simulated imaging and diffraction are used to identify antiphase domains in the films. Image simulation provides insight into the effects of atomic-scale ordering along the beam direction on HAADF-STEM intensity. We show that probe channeling results in ±20% variation in intensity for a given composition, allowing 3D ordering information to be probed using quantitative STEM.
Department of Materials Science and Engineering, The Ohio State University, Columbus, Ohio 43210, USA.
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Esser
Department of Physics, The Ohio State University, Columbus, Ohio 43210, USA.
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Hauser
Department of Materials Science and Engineering, The Ohio State University, Columbus, Ohio 43210, USA.
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Williams
School of Physics, University of Melbourne, Parkville, Victoria 3010, Australia.
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Allen
Department of Chemistry, The Ohio State University, Columbus, Ohio 43210, USA.
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Woodward
Department of Physics, The Ohio State University, Columbus, Ohio 43210, USA.
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Yang
Department of Materials Science and Engineering, The Ohio State University, Columbus, Ohio 43210, USA.
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McComb