Direct evidence for cation non-stoichiometry and cottrell atmospheres around dislocation cores in functional oxide interfaces
Date
2010
Authors
Arredondo, M.
Ramasse, Q.M.
Weyland, M.
Mahjoub, R.
Vrejoiu, I.
Hesse, D.
Browning, N.D.
Alexe, M.
Munroe, P.
Nagarajan, V.
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Advisors
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Type:
Journal article
Citation
Advanced Materials, 2010; 22(22):2430-2434
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Abstract
Long-range strain fields associated with dislocation cores at an oxide interface are shown to be sufficient enough to create significant variations in the chemical composition around the core (Cottrell atmospheres). Such stress-assisted diffusion of cations towards the cores is proposed to significantly impact the properties of nanoscale functional devices. The figure shows a Z-contrast image of a single dislocation core at an oxide interface. (Figure Presented)
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Data source: Supporting information, https://doi.org/10.1002/adma.200903631
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Copyright 2010 Wiley