^aDepartment of Mechanical Engineering, College of Engineering, Taif University, Taif 21944, Kingdom of Saudi Arabia

^bDepartment of Physics, Government College University, Faisalabad, Pakistan 38000.

^cDepartment of Chemistry, Government College University Faisalabad, Sahiwal Campus, Pakistan

Zin substituted Mg-Mn-Bi nano ferrites, Mg 0.5 Mn0.5-x znx Bi0.05 Fe1.95 O4 (x= 0, 0.125, 0.25, 0.375, 0.5) were synthesized using the sol gel auto combustion method. Structural parameters were analyzed through x-ray diffraction. It was revealed that all the samples are single phase spinel structure with Fd-3m space group and crystallite size, lattice constant and x-ray densities were varying with Zn concentration. RAMAN analysis showed the cation vibration. The DC resistivity was enhanced of all the samples with increasing concentration of Zn. The substitution of Zn also responsible for the variation of magnetic parameters as observed with VSM. Due to these remarkable properties all the prepared samples may be utilized at high frequency in microwave devices.