Preparation and characterization of epitaxial iron oxide films
- Pacific Northwest National Laboratory, P.O. Box 999, MS K2-12, Richland, Washington 99352 (United States)
Well-ordered, pure-phase epitaxial films of FeO, Fe{sub 3}O{sub 4}, and {gamma}-Fe{sub 2}O{sub 3} 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 {gamma}-Fe{sub 2}O{sub 3} and {alpha}-Fe{sub 2}O{sub 3} 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 {ge}350{degree}C is accompanied by significant Mg outdiffusion. The FeO(001) film surface exhibits a (2{times}2) reconstruction, which is accompanied by a significant amount of Fe{sup 3+} in the surface region. Fe{sub 3}O{sub 4}(001) has been found to reconstruct to a ({radical} (2) {times}{radical} (2) )R45{degree} structure. {gamma}{endash}Fe{sub 2}O{sub 3}(001) film surface is unreconstructed. {copyright} {ital 1998 Materials Research Society.}
- Research Organization:
- Pacific Northwest National Laboratory
- DOE Contract Number:
- AC06-76RL01830
- OSTI ID:
- 645449
- Journal Information:
- Journal of Materials Research, Journal Name: Journal of Materials Research Journal Issue: 7 Vol. 13; ISSN JMREEE; ISSN 0884-2914
- Country of Publication:
- United States
- Language:
- English
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