Publication:
Initial stages of the growth of mixed iron-cobalt oxides on Ru(0001)

Loading...
Thumbnail Image
Full text at PDC
Publication Date
2016
Advisors (or tutors)
Editors
Journal Title
Journal ISSN
Volume Title
Publisher
Elsevier
Citations
Google Scholar
Research Projects
Organizational Units
Journal Issue
Abstract
Mixed iron-cobalt oxides have been grown on a Ru(0001) single crystal substrate by reactive molecular beam epitaxy. The growth has been followed by low-energy electron microscopy and diffraction. Chemical characterization has been performed by selected area x-ray absorption spectroscopy. As previously known, iron grows into a wetting layer of FeO. In contrast, cobalt grows into three-dimensional islands of CoO, of either with a (111) –most common-or a (100) orientation. For mixed compositions, flat 2D growth is regained. Depending on temperature, either segregation into two FeCo compositions or a single phase is detected. In all cases the structure corresponds to an in-plane expanded (111)-oriented halite one. When only one phase is observed or for the Co-rich phase in the two phase film, its crystal structure is rotated by 30. relative to the Ru substrate, unlike the Co-poor phase which appears aligned with the substrate.
Description
© 2016 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license. Conferencia: E-MRS Spring Meeting / Symposium CC on In Situ Studies of Functional Nano Materials at Large Scale Facilities - From Model Systems to Applications (2016. Lille, Francia). This work is supported by the Spanish Ministry of Economy and Competitiveness through Projects No. MAT2015- 64110-C2-1-P, MAT2015-64110-C2-2-P and MAT2013-48009-C4-1-P. These experiments were performed at the CIRCE beamline of the ALBA Synchrotron Light Facility with the collaboration of ALBA staff.
UCM subjects
Física de materiales, Física del estado sólido
Unesco subjects
2211 Física del Estado Sólido
Keywords
Citation