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Fabrichnyi, P. B., Korolenko, M. V., Tkachenko, V. E., Danot, M. & Payen, C. (2007) Mossbauer effect at Sn-119(4+) nuclei in fine crystalline MnO. Russ. J. Inorg. Chem. 52 1262–1268. 
Added by: Laurent Cournède (2016-03-10 22:02:29)
Type de référence: Article
DOI: 10.1134/S0036023607080165
Numéro d'identification (ISBN etc.): 0036-0236
Clé BibTeX: Fabrichnyi2007
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Catégories: MIOPS
Mots-clés: coo, dopant ions, nio
Créateurs: Danot, Fabrichnyi, Korolenko, Payen, Tkachenko
Collection: Russ. J. Inorg. Chem.
Consultations : 9/413
Indice de consultation : 2%
Indice de popularité : 0.5%
Résumé     
The hyperfine structure of the low-temperature Mossbauer spectra of dopant Sn-119(4+) ions (0.4 at. \%) in a fine crystalline MnO sample, characterized by X-ray diffraction and magnetic measurements, has been studied. The Sn-119 spectra show that tin is distributed over positions with an inhomogeneous cationic environment. The appearance of such positions is explained by the local compensation for the excess charge of Sn4+ by manganese vacancies V (Mn) and segregation of defects resulting in precipitation of MnSnO3 clusters. The non-uniform distribution of Sn4+ and the related dependence of the number of broken magnetic bonds on the local tin concentration are responsible for the fluctuation of the T-N values, which is "perceived" by Sn-119 in different MnO crystallites. The Sn-119 spectra exclude the possibility that tin enters into the composition of superpara-magnetic particles.
Added by: Laurent Cournède  
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