Abstract
The ferrites of the compositions Zn xMg (1−x)+tTi tFe 2−2tO 4 are prepared by a standard ceramic method. The spinel structure is confirmed for these ferrites, however impurity lines for higher concentration of Mg have been observed. Compositional variation of lattice parameter has shown non linearity on addition of zinc which is explained by the combined effect of cation size on repulsion parameter and of the A-site charge on Madelung constant. Temperature variation of susceptibility has shown peaks which gradually disappear on addition of Zn. This is explained on SD-SP transition. The peak temperatures and Curie temperatures from X-T variation and obtained experimentally decrease on addition of Zn which is attributed to reduction of A-B interactions. The magnetisation studies have shown Neels two sublattice and three sublattice models applicable to the system. The values of M:M s and H c decrease on addition of Zn which is attributed to SD-MD transformation.
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