| Numéro |
J. Phys. Colloques
Volume 41, Numéro C1, Janvier 1980
International Conference on Mössbauer Spectroscopy
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|---|---|---|
| Page(s) | C1-461 - C1-462 | |
| DOI | https://doi.org/10.1051/jphyscol:19801181 | |
International Conference on Mössbauer Spectroscopy
J. Phys. Colloques 41 (1980) C1-461-C1-462
DOI: 10.1051/jphyscol:19801181
1 Facultad Fisica. Universidad de Barcelona. Diagonal 645. Barcelona 28. Spain
2 Facultad de Geologia. Universidad de Barcelona. Avda. José Antonio 585, Barcelona 7. Spain
J. Phys. Colloques 41 (1980) C1-461-C1-462
DOI: 10.1051/jphyscol:19801181
ANOMALOUS 57Fem CHARGE STATES IN COMPLEXES OXIDES
J. Tejada1, X. Obradors1, J. Fontcuberta1, J. Rodriguez2, R. Rodriguez2 et M. Oliva11 Facultad Fisica. Universidad de Barcelona. Diagonal 645. Barcelona 28. Spain
2 Facultad de Geologia. Universidad de Barcelona. Avda. José Antonio 585, Barcelona 7. Spain
Abstract
Mössbauer measurements on non-stoichiometric spinels (CoRh2O4+x, CoMn2O4+x) and oxygen deficient oxides with perovskites and perovskite related structures (LnCoO3-x with Ln=Eu, La, Dy, Y and LaCoO3 : Sr2+ (Ca2+)) dopped with 57Co have been done. It is argued that the charge states of the 57Fem daughter depend on the nature and concentration of vacancies present in the lattice. In perovskites the existence of vacancies both random and of ordered distribution has been observed.