Growth of iron oxides on Ag(111) - Reversible Fe2O3/Fe3O4 transformation

被引：40

作者：

Schlueter, C. ^{[1
,2
]}

Luebbe, M. ^{[2
]}

Gigler, A. M. ^{[2
,3
]}

Moritz, W. ^{[2
]}

机构：

[1] European Synchrotron Radiat Facil, F-38043 Grenoble, France

[2] Univ Munich, Dept Earth & Environm Sci, Sect Crystallog & Appl Mineral, D-80333 Munich, Germany

[3] Univ Munich, Ctr NanoSci CeNS, D-80799 Munich, Germany

来源：

SURFACE SCIENCE | 2011年 / 605卷 / 23-24期

关键词：

Low energy electron diffraction (LEED); X-ray scattering; diffraction; and reflection; Iron oxide; Epitaxy; Growth; Silver; Molecular beam epitaxy; EPITAXIAL-GROWTH; SURFACE-STRUCTURE; THIN-FILMS; MAGNETITE; ALPHA-FE2O3(0001); FE3O4(111); OXYGEN; IDENTIFICATION; DIFFRACTION; FE3O4(001);

D O I：

10.1016/j.susc.2011.07.019

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Iron oxide thin films were grown by multiple cycles of iron deposition and oxidation at different annealing temperatures. The oxide layers were characterized in-situ by X-ray diffraction and LEED and after the preparation ex-situ by confocal Raman microscopy. The results show that well ordered films of wustite, magnetite, and hematite can be grown on Ag(111). Wustite was observed at the initial stages of growth for films of similar to 10 angstrom thickness prior to magnetite formation. Magnetite films of several unit cells thickness were grown and studied by XRD and Raman spectroscopy. The magnetite films could be oxidized to epitaxial hematite films at low oxygen pressures. For our films, transformation from magnetite to hematite is reversible by annealing in UHV. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：1986 / 1993

页数：8

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