Preparation and Characterization of Epitaxial Iron Oxide Films

Gao, Yufei; Kim, Yong J.; Chambers, Scott A.

doi:10.1557/JMR.1998.0281

Preparation and Characterization of Epitaxial Iron Oxide Films

Journal Article · Wed Jul 01 00:00:00 EDT 1998 · Journal of Materials Research

DOI:https://doi.org/10.1557/JMR.1998.0281· OSTI ID:1756076

Gao, Yufei ^[1]; Kim, Yong J. ^[2]; ^[1]

BATTELLE (PACIFIC NW LAB)
ASSOC WESTERN UNIVERSITY

Well-ordered, pure-phase epitaxial films of FeO, Fe3O4, and ?–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 ?–Fe2O3 and a–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. ?–Fe23 (001) film surface is unreconstructed.

Research Organization:: Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)

Sponsoring Organization:: USDOE

DOE Contract Number:: AC05-76RL01830

OSTI ID:: 1756076

Report Number(s):: PNNL-SA-28492

Journal Information:: Journal of Materials Research, Journal Name: Journal of Materials Research Journal Issue: 7 Vol. 13

Country of Publication:: United States

Language:: English

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