Two-dimensional growth of SrTiO3 thin films on (001) MgO substrates using pulsed laser deposition and reflection high energy electron diffraction

Two-dimensional epitaxial growth of SrTiO3 is achieved on MgO, a substrate presenting a large lattice mismatch of 7.9%. In situ reflection high energy electron diffraction (RHEED) is used to monitor and control the growth. An interval deposition technique is implemented to force the two-dimensional...

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Bibliographic Details
Published in:Applied physics letters 2009-10, Vol.95 (17)
Main Authors: McMitchell, S. R. C., Tse, Y. Y., Bouyanfif, H., Jackson, T. J., Jones, I. P., Lancaster, M. J.
Format: Article
Language:English
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Summary:Two-dimensional epitaxial growth of SrTiO3 is achieved on MgO, a substrate presenting a large lattice mismatch of 7.9%. In situ reflection high energy electron diffraction (RHEED) is used to monitor and control the growth. An interval deposition technique is implemented to force the two-dimensional growth. It is necessary to deposit a single atomic layer of TiO2 before SrTiO3 to prevent the formation of high energy SrO/MgO interfaces and so allow the film to completely wet the substrate surface. Defect formation is inhibited. The resulting film exhibits a similar surface to the substrate and shows a streaky RHEED pattern.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.3254182