The CoO/Co3O4 phase transition studied by PAC |
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Authors: | D. Wegner Z. Inglot K. P. Lieb |
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Affiliation: | 1. II. Physikalisches Institut der Universit?t G?ttingen and SFB 126, G?ttingen/Clausthal Bunsenstr. 7-9, D-3400, G?ttingen, FRG
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Abstract: | The hyperfine environment of111Cd nuclei formed in the radioactive decay of111In ions implanted into CoO was studied via the PAC method. The quadrupole coupling constants measured in isochronal and isothermal annealing treatments at various oxygen pressures were related to the initial stages of the CoO→Co3O4 phase transition and interpreted as the successive trapping of cation vacancies at the111In probe. The phase transition was confirmed by X-ray diffraction, RBS and a PAC measurement on111Cd in spinel type Co3O4. |
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