Structural and magnetic studies of Ce-Mn doped M-type SrFe12O19 hexagonal ferrites by sol-gel auto-combustion method

The M-type hexagonal ferrites having the chemical formula Sr_1−xCe_xFe_12−yMn_yO₁₉ (x = 0.000, 0.025, 0.050, 0.075, and y = 0.00, 0.25, 0.50, 0.75) are fabricated via sol-gel auto combustion technique. We observed the effect of substitution of rare earth elements on structural and magnetic properties of M-type hexagonal ferrites. Scanning electron microscope (SEM), X-ray diffraction (XRD) strategies were applied for the systematical investigation of micrographs and structures of the samples respectively. Magnetic properties of all the samples were investigated through vibrating sample magnetometer (VSM). It is observed that the values of saturation magnetization (M_s) and remanence (M_r) decline with increasing the rare earth ions substitution. This decrease may follow the spin canting and magnetic dilution which results in dislocation of super exchange interactions. Synthesized samples having the value of coercivity of few hundred Oersteds show soft magnetic behavior. The synthesized samples may be applied for magnetic recording media and microwave absorbing materials.