Effect of fuel ratio and the impact of annealing temperature on particle size, magnetic and dielectric properties of manganese substituted CuFe2O4 nanoparticles

Manganese substituted copper ferrite nanoparticles were prepared by an auto-combustion technique. The preparation of nanoparticles was carried out using different fuel ratio such as 50%, 75% and 100% under combustion process. The products were characterized by XRD, SEM, EDX, TEM and VSM techniques. The reaction process has a significant role in controlling particle size which is identified from this study. The size of the particles in the range of ∼9-45 nm is obtained only at the 50% fuel ratio. The effect of fuel combustion ratio on the magnetic properties is discussed with the help of variation in saturation magnetization (Ms) and coercivity (Hc) by vibrating sample magnetometer (VSM). The saturation magnetization is decreased with increasing the fuel ratio. The dielectric loss and low value of dielectric constant have been measured in the frequency range of 100 kHz-5 MHz.