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The reduction and oxidation of epitaxial Fe3O4 films grown by reactive deposition on a Fe-p(1 × 1)O surface have been investigated by means of Auger electron spectroscopy (AES), low energy electron diffraction (LEED) and scanning tunneling microcopy (STM). The as-grown iron oxide samples display a square LEED pattern with a lattice constant compatible with a p(1 × 1) bulk terminated Fe3O4(001) surface. STM topographic images of Fe3O4 are characterized by atomically flat terraces separated by highly oriented steps running along the (010) and (100) crystallographic directions of the substrate. Upon annealing at 800 K in an ultra-high vacuum, AES reveals that magnetite transforms lớn FeO. The sample exposes the (001) surface of the rock salt structure, with a lattice parameter close lớn that of bulk wüstite. The Fe3O4 phase can be recovered by oxidation at 10−6 mbar of molecular oxygen.

Graphical abstract: Reversible metamorphosis from Fe3O4 lớn FeO of epitaxial iron oxide films grown on the Fe-p(1 × 1)O surface

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Article type

18 Dec 2020

12 Mar 2021

Xem thêm: screentime

First published
19 Mar 2021
This article is Open Access
Creative Commons BY license

RSC Adv., 2021,11, 11513-11518


Reversible metamorphosis from Fe3O4 lớn FeO of epitaxial iron oxide films grown on the Fe-p(1 × 1)O surface

M. Capra, A. Lodesani, A. Brambilla, M. Finazzi, L. Duò, F. Ciccacci and A. Picone, RSC Adv., 2021, 11, 11513 DOI: 10.1039/D0RA10650J

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

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