"Cadmium substituted Co-Zn ferrites 𝐶𝑜0.5𝑍𝑛0.5𝐶𝑑𝑥𝐹𝑒(2−𝑥)𝑂4 (𝑥=0.0, 0.1, 0.2, 0.4, and 0.5) were fabricated by using the Co-precipitation method. The molecular composition and prepared samples of cubic spinel structureswas characterized using X-ray diffraction peak (XRD). X-ray diffraction patterns obtained the most intensive peak at (311) crystallographic planes for x=0.5. Williamson-Hall (W-H) relation was associated with XRD data to determine the crystallite sizes range from 25.356 nm to 35.632 nm and strain value brought into being 0.0024 to 0.0021. Tetrahedral and octahedral sites of hoping length were found to diminish from 3.6707Å-3.6332Å and 2.9967Å-2.9662Å respectively due to the addition of Cd ion concentration. TEM analysis reveals the presence of spherical shape nanoparticles with agglomeration for the prepared samples. It could be referenced based on the investigation of results for molecule size by two XRD and TEM strategies which demonstrate the development of nanomaterials and doping of cobalt ferrites. TEM results are well agreed with the XRD diffraction pattern in crystallite size by using Scherrer’s formula. Fourier Transform Infrared Spectroscopy (FTIR) spectra analysis were carried out on synthesized ferrite samples and observed v1 and v2 strong absorption band in the range 400-4000 cm-1 be the possession to tetrahedral (A) and octahedral (B) sites. In FTIR, the increase of Cd2+ ion in Co-Zn ferrites leads to diminishing peak values towards lower wavenumbers. It is feasible to tune the magnetic characteristics of cobalt ferrite as a potential material for diverse technological applications by substituting Zn2+ and Cd2+ for cobalt magnetic ions."

The Co-Zn ferrites 𝐶𝐶𝐶𝐶0.5𝑍𝑍𝑍𝑍0.5𝐶𝐶𝐶𝐶𝑥𝑥𝐹𝐹𝐹𝐹(2−𝑥𝑥)𝑂𝑂4 (x-0.0, 0.1, 0.2, 0.3, 0.4, and 0.5) were synthesized by CO-precipitation method. The dielectric and structural properties has been investigated by effect of Cd doping in Co-Zn spinel ferrites. Dielectric constants were studied dependence of the frequency and temperature thus revealed that the dielectric dispersion based on the MaxwellWagner method polarizations are agreed with Koop’s conceptualization theory. Further, dielectric properties were studies over a frequency range from 10 kHZ to 30 MHZ. The dielectric constant is varied from 2.4 to 8.4 for real parts and 0.008 to 0.42 for imaginary parts, respectively. The tangent loss also recorded as 0.003 to 0.052 at 1 MHZ due to Co ions concentrations. In high and low frequencies of grain and grain boundary contribution is an important evident for obtained dielectric constant. The obtained values of coercivity (Hc) for these ferrites range between 280.4 Oe to 1380.3 Oe, based on VSM data. By converting Zn2+ and Cd2+ to cobalt magnetic ions it is possible to convert the magnetic properties of cobalt ferrite into a potential individual for numerous technical uses. The dielectric loss at room temperature and at high frequencies is found to be quite negligible. It is also discovered that when Cd is substituted, the dielectric loss tangent reduces.