Magnesium zinc ferrites with the general formula Mg_xZn_{(1 −x)}Fe₂O₄ were prepared by the standard ceramic technology route involving double sintering. X-ray analysis was carried out to confirm the single-phase formation as well as to calculate the lattice parameters. Two sets of samples were prepared by sintering the samples at 1100°C for 15 and 30 h respectively. The high-field loop tracer was used to measure the hysteresis parameters. It is observed that the sintering conditions effectively modify the magnetization characteristics of these ferrites.

Magnetic parameters such as saturation magnetization (σ_s), coercive force (H_c), remanence ratio (σ_r/σ_s) etc of Co_xMg_1−xFe₂O₄ (0⩽x⩽1) ferrites were measured at 300 and 80 K. The values ofσ_s,H_c and (σ_r/σ_s) increased as the content of cobalt increased. The magnetic momentμ_B was calculated using theσ_s data. The cation distribution has been suggested on the basis of these results.