Novel CoEr_0.05Fe_1.95O₄/polypyrole spinel ferrites for high-frequency utilizations: investigation and analysis

In the field of materials science, spinel ferrites are like priceless pearls owing of their unique crystalline structure and magnetic characteristics. Cobalt-erbium-based CoEr0.05Fe1.95 O-4 spinel ferrites and polypyrole composites with compositions (PF1:25%, PF2:50%, PF3:75%, and PF4:100%) were fabricated via a sol gel technique. The X-ray diffractogram pattern of prepared Er-doped cobalt ferrites showed a crystalline nature, while pure polypyrole has an amorphous nature. The dielectric characteristics of all these spinel ferrites in the X-band were determined by applying frequency (8-12 GHz). The temperature-dependent DC (direct current) electrical resistance of cobalt ferrite reduces with higher temperature. The magnetic behavior of prepared spinel ferrites was determined from the magnetic loop. There was a direct correlation between the quantity of RE ions and a rise in retentivity, coercivity, and saturation magnetization values. The saturation value is found at 41.98 emu/g, the remanence magnetization is found at 16 emu/g, and the activation energy is found at 0.14-0.25 eV. From all suggested parameters, prepared composites may be an ideal choice for high frequency utilizations.