2026-04-19T19:20:53Zhttps://recercat.cat/oai/request

oai:recercat.cat:2072/4346882026-03-13T05:15:01Zcom_2072_98col_2072_378192

urn:hdl:2072/434688 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 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/