In this study, Mn²⁺ substituted Co0._8−x Mn_x Zn_0.2 (where x = 0.0, 0.1, 0.2, and 0.3) ferrites are prepared by a coprecipitation method to study the effect of Mn²⁺ⁱons on the structural and morphological properties. These ferrites are characterized by X-ray powder diffraction (XRD), and Fourier transform infrared. X-ray diffraction patterns of the prepared samples confirm partial substitution of Mn²⁺ ions that does not change the basic structure of Co_0.8 Zn_0.2 Fe₂O₄. It also provides information about the formation of a single-phase spinel structure without any secondary phase. It is concluded that Co_0.6 Mn_0.2 Zn_0.2 Fe₂O₄ has a spherical shape with an average particle size of 22.51 nm based on TEM, as confirmed by the XRD analysis. FT-IR analysis confirms the formation of vibrational frequency bands associated with the entire spinel structure. The IR spectra of ferrites show two clear and sharp absorption bands in the range of 442.09 and 620.21 ^cm-1 in the range of 200–1000 ^cm-1, which confirms the formation of the ferrite composite.

AC conductivity, Co-precipitation method, Co–Zn ferrites, FTIR, Mn2+ substituted Co–Zn ferrite, XRD