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Preparation and characterization of epitaxial iron oxide films

Published online by Cambridge University Press:  31 January 2011

Y. Gao ,
Y. J. Kim  and
S. A. Chambers
Y. Gao
Affiliation:
P.O. Box 999, MS K8-93, Pacific Northwest National Laboratory, Richland, Washington 99352
Y. J. Kim
Affiliation:
P.O. Box 999, MS K8-93, Pacific Northwest National Laboratory, Richland, Washington 99352
S. A. Chambers
Affiliation:
P.O. Box 999, MS K8-93, Pacific Northwest National Laboratory, Richland, Washington 99352
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Extract

Well-ordered, pure-phase epitaxial films of FeO, Fe3O4, and γ–Fe2O3 were prepared on MgO(001) by oxygen-plasma-assisted MBE. The stoichiometries of these thin films were controlled by varying the growth rate and oxygen partial pressure. Selective growth of γ–Fe2O3 and α–Fe2O3 was achieved by controlling the growth conditions in conjunction with the choice of appropriate substrates. Growth of the iron oxide epitaxial films on MgO at ≥350 °C is accompanied by significant Mg outdiffusion. The FeO(001) film surface exhibits a (2 × 2) reconstruction, which is accompanied by a significant amount of Fe3+ in the surface region. Fe3O4 (001) has been found to reconstruct to a structure. γ–Fe23 (001) film surface is unreconstructed.

Type
Articles
Information
Journal of Materials Research , Volume 13 , Issue 7 , July 1998 , pp. 2003 - 2014
Copyright
Copyright © Materials Research Society 1998

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