6533b7dafe1ef96bd126df6a

RESEARCH PRODUCT

Tetrahedral versus octahedral Mn site coordination in wurtzite and rocksalt Zn1−xMnxO investigated by means of XAS experiments under high pressure

Juan Angel SansJean-paul ItiéAlfredo SeguraJulio Pellicer-porresJuan F. Sánchez-royoAlain PolianP. LagardeA. M. Flank

subject

010302 applied physicsX-ray absorption spectroscopyMaterials scienceExtended X-ray absorption fine structure02 engineering and technology021001 nanoscience & nanotechnologyCondensed Matter Physics01 natural sciencesXANESSpectral lineX-ray absorption fine structureCrystallographyOctahedron0103 physical sciencesGeneral Materials ScienceElectrical and Electronic EngineeringAbsorption (chemistry)0210 nano-technologyWurtzite crystal structure

description

Abstract We present the results of x-ray absorption measurements carried out in Zn 1− x Mn x O thin films under high pressure. The Mn environment remains essentially the same for nominal Mn concentrations given by x = 0.05 , 0.1, 0.15 and 0.25. Both the XANES (X-ray Absorption Near Edge Structure) and EXAFS (Extended X-ray Absorption Fine Structure) indicate that Mn occupies the Zn site, being surrounded by four oxygen atoms at 2.02±0.01 A. The substitutional hypothesis is reinforced by comparing the differences between the ambient (wurtzite) and high pressure (rocksalt) spectra, which correspond to tetrahedral and octahedral Mn environments.

yearjournalcountryeditionlanguage
2007-07-01Superlattices and Microstructures
https://doi.org/10.1016/j.spmi.2007.04.059