The Mn_1-xZn_xFe₂O₄ (x = 0.46, 0.47, 0.48, 0.50, 0.51) ferrite materials were prepared by solid-state reaction. The effects of varying Zn concentration on the magnetic characteristics and microstructure of MnZn ferrites were investigated. All of these ferrites are one spinel phase, according to XRD analysis, and no additional heterogeneous phases are generated. The diffraction peaks of the samples appear to be shifted to a higher angle compared to the standard cards. The sample's very big and irregular grain development caused the sample's grain size to vary as the zinc level increased. The power loss of MnZn ferrite can be decreased because to this phenomena. The P_CV value decreases as the Zn level of the samples increases. The P_CV of this ferrite is as high as 242.6 mW/cm³ at a frequency of 150 kHz with a Zn concentration of x = 0.46. Under the same test circumstances, ferrite's P_CV value is only 115.2mW/cm³ when the Zn concentration is x = 0.48. The complex permeability of the samples rises with an increase in Zn concentration. In the ferrite sample with the highest Zn content (x = 0.51), its μ' value keeps at a high level with the change of frequency. When the frequency is 10 kHz, the μ' value is as high as 260.9. Additionally, all of these ferrite samples demonstrated stability against interference at frequencies lower than 150 kHz

Keywords: MnZn ferrite, Zn content, Microstructure, Magnetic properties, Complex permeability