MOSSBAUER, INFRARED, AND X-RAY STUDIES OF THE MN-ZN FERRITES

Manganese-zinc ferrite Mn1-xZnxFe2O4 with different values of x is prepared by the usual ceramic technique. X-ray analysis shows that the samples are cubic spinels (single phase). The lattice parameter, the theoretical density, the bulk density, and the porosity are deduced and their variation with Zn2+ additions is studied. The samples are studied by Mossbauer spectroscopy. The effect of a variation of Zn2+ concentration on the various hyperfine interactions is discussed. The cation distribution of the compounds is deduced. The infrared spectra of the samples in the range 200 to 4000 cm(-1) are reported. Four bands v(1), v(2), v(3), and v(4) are observed. The high-frequency band v(1) is assigned to the tetrahedral complexes, v(2) and v(3) to the octahedral complexes and octahedral divalent metal oxygen ion complexes, respectively. The lowest band v(4) is attributed to the lattice vibrations of the system.