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Molecular Beam Epitaxy of Rubidium Barium Bismuth Oxide: Structural Phenomena in Perovskite Heteroepitaxy

Published online by Cambridge University Press:  28 February 2011

E. S. Hellman ,
E. H. Hartford ,
D. J. Werder  and
R. M. Fleming
E. S. Hellman
Affiliation:
A. T. & T. Bell Laboratories, 600 Mountain Avenue, Murray Hill, NJ 07974
E. H. Hartford
Affiliation:
A. T. & T. Bell Laboratories, 600 Mountain Avenue, Murray Hill, NJ 07974
D. J. Werder
Affiliation:
A. T. & T. Bell Laboratories, 600 Mountain Avenue, Murray Hill, NJ 07974
R. M. Fleming
Affiliation:
A. T. & T. Bell Laboratories, 600 Mountain Avenue, Murray Hill, NJ 07974
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Abstract

The simple cubic perovskite crystal structure of superconducting (Rb,Ba)BiO3 makes it an ideal system for the study of perovskite heteroepitaxy. We report novel growth phenomena which have been observed in (Rb,Ba)BiO3 films grown by molecular beam epitaxy (MBE). For growth on MgO, the orientation of the film is observed to depend on the substrate temperature during growth, changing from (1 1 0) to (1 0 0) with increasing temperature. For films on SrTiO3, the large (10%) lattice mismatch appears to cause small grain rotations, resulting in a film with many low angle grain boundaries. In at least one growth regime, (2 2 1) oriented grains nucleate and grow on Ʃ3 coincidence boundaries on a faceted (1 0 0) oriented film.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 169: Symposium M – High Temperature Superconductors: Fundamental Properties and Novel Materials Processing , 1989 , 719
Copyright
Copyright © Materials Research Society 1990

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References

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