Atomic structure of Ba0.5Sr0.5TiO3 thin films on LaAlO3

H. J. Gao; C. L. Chen; B. Rafferty; S. J. Pennycook; G. P. Luo; C. W. Chu

doi:10.1063/1.125071

Atomic structure of Ba_0.5Sr_0.5TiO₃ thin films on LaAlO₃

H. J. Gao, C. L. Chen, B. Rafferty, S. J. Pennycook, G. P. Luo, C. W. Chu

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Abstract

Perovskite barium strontium titanate Ba_0.5Sr_0.5TiO₃(BST) thin films were grown on (001) LaAlO₃ (LAO) using pulsed-laser ablation. The microstructures of the as-grown BST films were studied with selected electron diffraction, transmission electron microscopy, and scanning transmission electron microscopy. The BST thin films are oriented with their [001] directions parallel to the 〈102〉 directions of the LAO. Both cross-sectional and plan-view studies show the BST films to be single crystals with smooth surfaces. The interfaces were seen to be atomically sharp by cross-sectional, high-resolution electron microscopy. The density of misfit dislocations was consistent with the 4.3% lattice mismatch, and they were found to be dissociated into partials.

Original language	English
Pages (from-to)	2542-2544
Number of pages	3
Journal	Applied Physics Letters
Volume	75
Issue number	17
DOIs	https://doi.org/10.1063/1.125071
Publication status	Published - 1999 Oct 25

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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10.1063/1.125071

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abstract = "Perovskite barium strontium titanate Ba0.5Sr0.5TiO3(BST) thin films were grown on (001) LaAlO3 (LAO) using pulsed-laser ablation. The microstructures of the as-grown BST films were studied with selected electron diffraction, transmission electron microscopy, and scanning transmission electron microscopy. The BST thin films are oriented with their [001] directions parallel to the 〈102〉 directions of the LAO. Both cross-sectional and plan-view studies show the BST films to be single crystals with smooth surfaces. The interfaces were seen to be atomically sharp by cross-sectional, high-resolution electron microscopy. The density of misfit dislocations was consistent with the 4.3% lattice mismatch, and they were found to be dissociated into partials.",

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T1 - Atomic structure of Ba0.5Sr0.5TiO3 thin films on LaAlO3

AU - Gao, H. J.

AU - Chen, C. L.

AU - Rafferty, B.

AU - Pennycook, S. J.

AU - Luo, G. P.

AU - Chu, C. W.

PY - 1999/10/25

Y1 - 1999/10/25

N2 - Perovskite barium strontium titanate Ba0.5Sr0.5TiO3(BST) thin films were grown on (001) LaAlO3 (LAO) using pulsed-laser ablation. The microstructures of the as-grown BST films were studied with selected electron diffraction, transmission electron microscopy, and scanning transmission electron microscopy. The BST thin films are oriented with their [001] directions parallel to the 〈102〉 directions of the LAO. Both cross-sectional and plan-view studies show the BST films to be single crystals with smooth surfaces. The interfaces were seen to be atomically sharp by cross-sectional, high-resolution electron microscopy. The density of misfit dislocations was consistent with the 4.3% lattice mismatch, and they were found to be dissociated into partials.

AB - Perovskite barium strontium titanate Ba0.5Sr0.5TiO3(BST) thin films were grown on (001) LaAlO3 (LAO) using pulsed-laser ablation. The microstructures of the as-grown BST films were studied with selected electron diffraction, transmission electron microscopy, and scanning transmission electron microscopy. The BST thin films are oriented with their [001] directions parallel to the 〈102〉 directions of the LAO. Both cross-sectional and plan-view studies show the BST films to be single crystals with smooth surfaces. The interfaces were seen to be atomically sharp by cross-sectional, high-resolution electron microscopy. The density of misfit dislocations was consistent with the 4.3% lattice mismatch, and they were found to be dissociated into partials.

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Atomic structure of Ba_0.5Sr_0.5TiO₃ thin films on LaAlO₃

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