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The effect of cadmium ion insertion on structural, optical and electrical properties of Zn0.3 Co0.7-xCdxFe2O4 ferrites ( 0 ≤ x ≤ 0.7 with interval 0.14) have been characterized by XRD, EDX, FTIR, UV and I-V techniques. The material was synthesized using coprecipitation route. The growth of single phase cubic structure of samples was confirmed using XRD technique. The crystallite size was calculated from XRD spectra, which was found in the range of 27-39 nm. The FTIR spectra showed the two strong absorption bands at about 443 cm-1 and 547.08 cm-1 which confirmed their spinel cubic phase. The electrical resistivity of synthesized ferrites with the insertion of Cd2+ ion was found to be in the range of 4.14×108 - 9.67×108 Ω-cm. The electrical resistivity was found to be decreasing with increase of temperature. The activation energy also increased with the increase of Cd2+ and was found in the range of 0.02 - 0.05 eV. [ABSTRACT FROM AUTHOR]

Zn-substituted Cu-Ni ferrite nanoparticles ZnxCu0.5-xNi0.5Fe2O4, (where 0 = x = 0.5 with interval 0.1) have been synthesized using co-precipitation method which have been sintered at 900°C for 3 h. The X-ray diffraction (XRD) technique has been employed to confirm the single phase formation of spinel ferrite structure. The average particle size has been found in the range of 14-28 nm which has been estimated using Scherer's formula. The morphology of synthesized particle size has been confirmed using scanning electron microscopy (SEM). The size of particles has been found in close agreement with the XRD analysis. The optical band gap energy has been measured for x = 0.5 which have been found 2.3 eV. Moreover, the magnetic properties of sample x = 0.00 have also been observed. The saturation magnetization (Ms), remanance, Mr/Ms and coercive force have been observed. The obtained information of synthesized samples have super paramagnetic nature. [ABSTRACT FROM AUTHOR]