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Initial Stages of the Growth of Mixed Iron-cobalt Oxides on Ru(0001) Martín García, Laura Quesada, Adrian Pérez, Lucas Foerster, Michael Aballe, Lucía Figuera, Juan de la Cobalt monoxide Iron monoxide Reactive molecular beam epitaxy Low-energy electron microscopy Selected area x-ray absorption Photoemission electron microscopy 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. 2016 Article https://ddd.uab.cat/record/202507 urn:10.1016/j.phpro.2016.11.075 urn:oai:ddd.uab.cat:202507 urn:scopus_id:85007012316 urn:articleid:18753892v85p12 urn:wos_id:000392696100002 eng Ministerio de Economía y Competitividad MAT2015-64110-C2-1-P Ministerio de Economía y Competitividad MAT2015-64110-C2-2-P Ministerio de Economía y Competitividad MAT2013-48009-C4-1-P Physics Procedia ; Vol. 85 (2016), p. 12-19 open access Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades. https://creativecommons.org/licenses/by-nc-nd/4.0/ application/pdf