The charge states of iron in insulators implanted with57Co and57Fe |
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| Authors: | I. Dézsi R. Coussement S. Fehér G. Langouche Cs. Fetzer |
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| Affiliation: | (1) Central Research Institute for Physics, POB 49, H-1525 Budapest, Hungary;(2) Instituut voor Kern-en Stralingsfysika, University of Leuven, B-3030 Heverlee, Belgium |
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| Abstract: | Single crystals of α-Al2O3 and LiNbO3 were implanted with57Co (dose: up to 2×1015 atoms/cm2) and with57Fe (dose: 2×1015 atoms/cm2) ions. The Mössbauer spectra revealed the disordered atomic environment. Fe2+ and Fe3+ charge states were observed. The spectra were compared to the spectra of crystals doped with57Co. It was remarkable that in the doped α-Al2O3 Fe3+ states with slow spin-spin relaxation have appeared. The CEMS study of the samples implanted with57Fe resulted in Fe2+ ionic states indicating that a fraction of Co atoms can also be in Co2+ state. |
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