Abstract
57Fe Mössbauer effect study in the polycrystalline solid solutions of Zn 0.25Ni 0.75+ tTi t Fe 2−2 t O 4 ( t=0.0-0.5) has been carried out at room temperature. All the samples exhibited two pure Zeeman sextets corresponding to tetrahedral and octahedral sites. The present work has been aimed at investigating the influence of tetravalent titanium substitution on the isomer shift, quadrupole splitting, nuclear magnetic fields at 57Fe nuclei for tetrahedral and octahedral sites and the cation distribution. The isomer shift was found to be independent of substitution level t. Nuclear magnetic field H A decreases faster than H B with t. From the variation of H A and H B with t it is concluded that for higher titanium substituted samples, titanium occupies both the B as well as A sites.
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