Characterization of microstructure and magnetic properties for Fe ion-doped CoGa2O4

All samples of CoGa 2- x Fe x O 4 ( x = 0.0, 0.4, 0.8, 1.2, 1.6) systematically synthesized using a traditional ceramic technology in the present work. Phase purity, crystal structure, valence state distribution, ion occupancy rate, and magnetic properties of the prepared samples are systematically investigated with X-ray diffraction, scanning electron microscopy, energy dispersive X-ray spectroscopy, X-ray photoelectron spectroscopy, and vibrating sample magnetometer measurements. The experimental results exhibited that the Curie temperature ( T c ), intrinsic coercivity ( H c ), saturation magnetization ( M s ), real permeability ( µ ′), and core loss P cv performance of Fe ion-doped CoGa 2 O 4 were optimized at the appropriate doping content. Compared with x = 0, the doped sample obtained the relatively high M s = 85 emu/g and lower H c is 180 Oe in x = 1.2. Besides, a higher Curie temperature ( T c ), a higher real permeability ( µ ′) value, and a relatively low P cv value were obtained. Comprehensive experimental results show that the sample possesses a wider range of application under the doping levels of x = 1.2.