1. Lattice locations and properties of Fe in Co/Fe co-implanted ZnO.
- Author
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Gunnlaugsson, H. P., Johnston, K., Mo\lholt, T. E., Weyer, G., Mantovan, R., Masenda, H., Naidoo, D., Ólafsson, S., Bharuth-Ram, K., Gíslason, H. P., Langouche, G., Madsen, M. B., and the ISOLDE Collaboration
- Subjects
PHYSICS research ,CRYSTAL lattices ,MOSSBAUER spectroscopy ,SPECTRUM analysis ,ELECTRON spin ,SEMICONDUCTOR doping ,ZINC oxide - Abstract
The lattice locations and electronic configurations of Fe in 57Co/57Fe implanted ZnO (to (5-6) × 1014 Fe/cm-2) have been studied by 57Fe Mössbauer emission spectroscopy. The spectra acquired upon room temperature implantation show ∼20% of the probe atoms as Fe2+ on perturbed Zn sites and the remaining fraction as Fe2+ in damage sites of interstitial character. After annealing at 773 K, ∼20% remain on crystalline sites, while the damage fraction has partly disappeared and instead a ∼30% fraction occurs as high-spin Fe3+, presumably in precipitates. This suggests that precipitation of Co/Fe in ZnO likely takes place at relatively low temperatures, thus explaining some of the discrepancies in the literature regarding magnetic properties of 3d metal-doped ZnO. [ABSTRACT FROM AUTHOR]
- Published
- 2012
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