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Microstructure and Reconstruction of LaAlO3 {100} and {110} Surfaces

Published online by Cambridge University Press:  21 February 2011

Z. L. Wang  and
A. J. Shapiro
Z. L. Wang
Affiliation:
Metallurgy Division, National Institute of Standards and Technology, Gaithersburg, MD 20899.
A. J. Shapiro
Affiliation:
Metallurgy Division, National Institute of Standards and Technology, Gaithersburg, MD 20899.
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Abstract

Lathanum-aluminate (LaAlO3) is one of the optimum substrates for epitaxic growth of thin oxide films. In this paper, the structures of the {100} and {110} surfaces of annealed LaAlO3 are studied using reflection electron microscopy (REM). [010] and [001] steps have been observed on {100}, these are believed to be the lowest surface energy steps. The {100} surface is atomically flat, but the {110} surfaces exhibit high-density fine structures distributed on large surface terraces. These fine structures may correspond to the formation of small width (100) and (010) facets on the (110) surface. The 5×5 reconstruction is observed on {100}. No reconstruction is found on {110}.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 355: Symposium B1 – Evolution of Thin-Film and Surface Structure and Morphology , 1994 , 175
Copyright
Copyright © Materials Research Society 1995

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References

REFERENCES

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