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Microstructure of epitaxial bilayer films on substrates
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View: Figures


Image of FIG. 1.
FIG. 1.

XRD -scan of the STO 103, SRO 211, SRO 206, and BST 303 peaks indicating a epitaxial relationship.

Image of FIG. 2.
FIG. 2.

RBS random (◻) and channeling (엯) spectra of - (a), - (b), and - (c) thick BST films deposited on SRO/STO. The symbols represent the experimental data whereas the solid lines correspond to the simulated spectra. The minimum channeling yields are specified.

Image of FIG. 3.
FIG. 3.

Low-magnification lattice fringe images of - (a), - (b), and - (c) thick BST films stacked between - (top) and - (bottom) thick SRO layers. The horizontal arrows denote the SRO/BST and BST/SRO interfaces, the dot lines mark the sublayer interfaces, and the vertical arrows point to planar defects between columnar features. Zone axis is indicated in the left bottom of each image.

Image of FIG. 4.
FIG. 4.

Lattice image of -thick BST film shows three dislocations , , and with Burger vectors of , , and , respectively, at the interface between the first -thick sublayer (1L) and the second sublayer (2L).

Image of FIG. 5.
FIG. 5.

(a) Lattice images of a -thick BST film stacked between - (top) and - (bottom) thick SRO layers. (b) Map of the lattice distortion along the out-of-plane axis within region displayed in (a). The frames are used to average horizontally the lattice distortion map, so-obtained profiles in arrow direction are shown in (c) and (d). The depth axes correspond to the vertical distance to the upper SRO/BST interface measured in pixel. Profiles of the lattice distortion relative to the SRO lattice within dislocation core (c) and dislocation-free (d) areas. 1L and 2L denote the first and second BST sublayers.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Microstructure of epitaxial Ba0.7Sr0.3TiO3∕SrRuO3 bilayer films on SrTiO3 substrates