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

All samples of CoGa2-xFexO4 (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 (Tc), intrinsic coercivity (Hc), saturation magnetization (Ms), real permeability (µ′), and core loss Pcv performance of Fe ion-doped CoGa2O4 were optimized at the appropriate doping content. Compared with x = 0, the doped sample obtained the relatively high Ms = 85 emu/g and lower Hc is 180 Oe in x = 1.2. Besides, a higher Curie temperature (Tc), a higher real permeability (µ′) value, and a relatively low Pcv value were obtained. Comprehensive experimental results show that the sample possesses a wider range of application under the doping levels of x = 1.2.