LAUSR

Abstract The present study focuses on the optimization of critical process parameters in MnFe2O4 doped by Zn and Dy to obtain high magnetic saturation (Ms), low magnetic remanence (Mr), low coercivity (Hc), and fine crystallite size (D). To this end, Taguchi method was used to investigate the simultaneous effects of Dy and Zn content, pH value, calcination time, and temperature on the structural and magnetic properties. Using five different levels for each parameter, 25 unique experiments were defined based on L25 orthogonal array of the Taguchi method to investigate the optimum conditions. Moreover, the experimental results showed that the crystallite size and the magnetic saturation are in the range of 13-30 nm and 30-67 emu/g, respectively. According to the experiment and ANOVA results, calcination time is the most significant factor influencing the crystallite size, and Zn content is the most significant factor influencing the magnetic saturation. Moreover, it was found that the highest Ms value belongs to the sample, which was optimized by the Taguchi method.