The microwave absorbers based on BiFeO3 have been widely used in the microwave absorbing region due to their excellent electromagnetic characteristics and properties. This study investigated
the Li doping effect on the structure, magnetic properties, and microwave absorption efficiency of Bi1−xLixFeO3 nanoparticles (x= 0.02, 0.04, and 0.06), which were created using the sol-gel method. The test results showed that the increase in the Li doping concentration affects the ferromagnetic properties of the material. The highest magnetic properties were obtained at a concentration of x = 0.06. The magnetic saturation value Ms = 5.4 emu g −1, the magnetic remanence value Mr = 1.53 emu g−1, and the coercive field Hc =106.73 Oe were obtained from the concentration x = 0.06. The doping of x = 0.06 produced three absorption peaks, and the highest absorption peak was −46 dB at 11.22 GHz. To identify the microstructures and electromagnetic properties of the preliminary samples, X-ray diffraction, scanning electron microscopy, and vector network analysis studies were performed. The results showed that Bi1−xLixFeO3 nanoparticles were successfully collected and that the prepared samples had
excellent absorption properties. Overall, due to their outstanding microwave absorption efficiency, Bi1−xLixFeO3 nanoparticles have numerous potential applications.

Keywords BiFeO3; Li doping; Magnetic properties; Reflection loss