Phase Transitions at the Mn/ZnO(000-1) Interface Probed by High Energy X ray Spectroscopies

Mac Mugumaoderha Cubaka, Robert Sporken, Jacques Ghijsen, Frank M.F. de Groot, Jacques Dumont

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Résumé

Phase transitions occurring at the Mn/ZnO interface upon annealing are probed in situ by high-energy X-ray: photoelectron and absorption spectroscopies. A thin Mn film (∼1 nm) is grown on the (0001̄) surface of a ZnO single crystal. Upon annealing to progressively higher temperature ranging from 575 to 800 K, various Mn phases form successively. At first, the Mn film oxidizes and a MnO layer forms on top of the surface. Then, while Mn atoms diffuse deeper into the bulk of ZnO, Zn yMn 3-yO 4 starts to form. Finally, at the highest annealing temperature, Mn appears to be substitutionally diluted at Zn sites within the ZnO lattice.

langue originaleAnglais
Pages (de - à)665-670
Nombre de pages6
journalJournal of physical chemistry. C
Volume116
Numéro de publication1
Les DOIs
Etat de la publicationPublié - 12 janv. 2012

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