Oxidation Behavior of a Fe/MnO Ultrathin Film Studied by XPS

V. Di Castro, S. Ciampi and L. Sestili
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V. Di Castro: Department of Chemistry, University "La Sapienza," P. Aldo Moro 5, 00185 Roma, Italy
S. Ciampi: Department of Chemistry, University "La Sapienza," P. Aldo Moro 5, 00185 Roma, Italy
L. Sestili: Department of Chemistry, University "La Sapienza," P. Aldo Moro 5, 00185 Roma, Italy

Surface Review and Letters (SRL), 1998, vol. 05, issue 01, 393-396

Abstract: The oxidation of a 9-Å-thick iron layer on MnO at room temperature has been investigated by X-ray photoelectron spectroscopy. By exposure toO2, iron is oxidized first to Fe(II) and then to Fe(III). During the oxide formation a fast oxygen adsorption and initial oxidation to Fe(II) is followed by a slower oxygen incorporation and Fe(III) formation. After exposure to 1500L O2Fe3O4seems to be formed at the surface, while the iron layer is not completely oxidized.

Date: 1998
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DOI: 10.1142/S0218625X98000724

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