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

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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.

頁(從 - 到)2542-2544
期刊Applied Physics Letters
出版狀態Published - 1999 10月 25

All Science Journal Classification (ASJC) codes

  • 物理與天文學(雜項)


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