Effect of Ce–Dy co-doping on structure, morphology and magnetic properties of strontium ferrite

M-type strontium ferrite Sr 0.98 Ce 0.02 Dy x Fe 12- x O 19 ( x =0.00-0.20) doped with Ce-Dy elements was prepared by solid-phase sintering. The X-ray diffraction (XRD) results revealed the formation of the M-type hexaferrite having P6 3 /mmc as a space group along with the co-existence of a secondary DyFeO 3 phase; The field emission scanning electron microscopy (FESEM) results show that the grain boundaries of the samples are clear, the crystallinity is good and the grains have been refined; The purity of the sample can be proved by energy dispersive spectrometer (EDS), and no other elements were found except for doped elements; It is clear that the experimental weight percentages of each element are quite close to the theoretical from the reactants used to synthesize each sample. Meanwhile, the FTIR results show tetrahedral and octahedral tensile vibration peaks induced by Fe–O bonds of M-type strontium ferrite; Through the analysis of the vibrating sample magnetometer (VSM), when the doping amount of Dy element is x =0.08, the coercive force of strontium ferrite is increased. At this time, hard ferrite with high coercive force and high saturation magnetization intensity is prepared. Demonstrating the unlimited potential of M-type strontium ferrite in the fields of magnetic recording and storage devices.