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Interface Characterization of AlN/TiN/MgO(001) Prepared by Molecular Beam Epitaxy

Published online by Cambridge University Press:  31 January 2011

X. L. Ma*
Affiliation:
Japan Fine Ceramics Center, 2–4-1 Mutsuno, Atsuta-ku, 456 Nagoya, Japan
N. Shibata
Affiliation:
Japan Fine Ceramics Center, 2–4-1 Mutsuno, Atsuta-ku, 456 Nagoya, Japan
Y. Ikuhara
Affiliation:
Department of Materials Science, The University of Tokyo, 113 Tokyo, Japan
*
a)Address all correspondence to this author. E-mail: [email protected]
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Abstract

The AlN/TiN/MgO(001) interfaces, prepared by molecular beam epitaxy, have been characterized by cross-sectional high-resolution electron microscopy (HREM). The thin TiN buffer layer, with the thickness of 40 nm, is epitaxially grown on the MgO(001) substrate. Owing to the same structure-type as well as the small mismatch of their lattice parameters, the growth is governed by the parallel orientation relationship of (001)TiN||(001)MgO, (010)TiN||(010)MgO, and (111)TiN||(111)MgO. Two kinds of processes of the hexagonal AlN epitaxial growth on the as-received TiN(001), differed by the (0001)AlN plane parallel to, and the (1012) plane approximately parallel to the MgO substrate surface, respectively, are identified, and within them, several cases are classified which are based on the consideration of crystallographic symmetry. Theoretical calculations based on the geometrical model that was recently proposed and applied to a number of epitaxial systems have been carried out to rationalize these observations.

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Articles
Copyright
Copyright © Materials Research Society 1999

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References

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