57Fe NMR study of manganese ferrites

Magnetic properties of the manganese ferrites MnxFe3-xO4MnxFe3-xO4 are markedly influenced by the valence states of Mn and Fe ions and by their distribution between the octahedral and tetrahedral sublattices. Hyperfine methods are capable of providing useful information on these characteristics, which is difficult to obtain otherwise. In the present contribution the MnxFe3-xO4(0.52