Investigating the microwave absorption properties of nanostructure composite particles of SrFe12O19/ZnFe2O4

Ferromagnetic SrFe12O19/ZnFe2O4 nanostructure composite particles were synthesized by the co-precipitation of chloride salts utilizing the sodium hydroxide solution. The resulting precursors were heat treated from 900 to 1200 °C for 4 h. The microwave absorption properties of the nanostructure composite particles were studied by ferromagnetic resonance, transmit-line theories, and reflection loss (RL) plots. Based upon the theoretical results, the microwave absorption properties can be improved by increasing the saturation magnetization and the thickness to the optimum size and decreasing the coercivity. By increasing the thickness to the optimum size and raising the heat treatment temperature (HT), the microwave absorption properties were increased (according to theoretical results). For example, the RL (at the resonance frequency) was increased from − 5 to − 15 dB by increasing the temperature from 900 to 1200 °C.