57Fe-Mössbauer studies of the CuxFe3−xO4 spinel system
- 15 October 1981
- journal article
- research article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 75 (8) , 3674-3678
- https://doi.org/10.1063/1.442532
Abstract
Mössbauer spectroscopy has been used to examine the effect of increasing copper ion concentration on the iron distribution in Cu x Fe3−x O4(0⩽x⩽0.9). For x⩽0.37, fast electron exchange among octahedral ironions occurs as in Fe3O4, suggesting that the itinerant electrons associated with the octahedral Fe2+ions remain delocalized in the sublattice. At high values of x (x⩾0.59), however, the itinerant electrons become localized in a small fraction of exchange‐coupled ironions. The relative numbers of distinguishable cations making up the complements of the octahedral sites of the copperferrites are determined.Keywords
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