J. Phys. IV France 07 (1997) C1-259-C1-260
Optical Properties of Mixed Cobalt FerritesM. Lenglet1, F. Hochu2 and J. Dürr2
1 L.A.S.T.S.M, Université de Rouen, 76821 Mont-Saint-Aignan, France
2 École des Mines de Douai, 59508 Douai, France
The optical properties of Co and Mg ferrigallate spinels have been studied near the magnetic transition. The cluster (CoFeO10)15 is characterized by a strong intensification of iron pair excitations and by the existence in ferrimagnetic compounds of a large electronic transition assigned to Co2+ → Fe3+ metal-metal charge transfer at 1.70-1.75 eV.
© EDP Sciences 1997