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

All samples of CoGa_2-xFe_xO₄ (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 CoGa₂O₄ 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. [ABSTRACT FROM AUTHOR]