A real-time XAS PEEM study of the growth of cobalt iron oxide on Ru(0001)

The growth of mixed cobalt-iron oxides on Ru(0001) by high-temperature oxygen-assisted molecular beam epitaxy has been monitored in real time and real space by x-ray absorption photoemission microscopy. The initial composition is a mixed Fe–Co(II) oxide wetting layer, reflecting the ratio of the dep...

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Veröffentlicht in:	The Journal of chemical physics 2020-02, Vol.152 (7), p.074704-074704
Hauptverfasser:	Ruiz-Gómez, S., Mandziak, A., Prieto, J. E., Aristu, M., Trapero, E. M., Soria, G. D., Quesada, A., Foerster, M., Aballe, L., de la Figuera, J.
Format:	Artikel
Sprache:	eng
Schlagworte:	Cobalt Composition High temperature Iron oxides Islands Molecular beam epitaxy Photoelectric emission Physics Real time Spinel Wetting X ray absorption
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Beschreibung
Zusammenfassung:	The growth of mixed cobalt-iron oxides on Ru(0001) by high-temperature oxygen-assisted molecular beam epitaxy has been monitored in real time and real space by x-ray absorption photoemission microscopy. The initial composition is a mixed Fe–Co(II) oxide wetting layer, reflecting the ratio of the deposited materials. However, as subsequent growth of three dimensional spinel islands nucleating on this wetting layer takes place, the composition of the oxide in the wetting layer changes as iron is transferred into the spinel islands. The composition of the islands themselves also changes during growth.
ISSN:	0021-9606 1089-7690
DOI:	10.1063/1.5140886