Fe3O4 cladding enhanced magnetic natural resonance and microwave absorption properties of Fe0.65Co0.35 alloy flakes

Fe-35Co/Fe3O4 composite were prepared by using the solvothermal method. An optimal reflection loss (RL) of −41.4 dB was measured at 2.02 GHz for a thickness of 5.89 mm and the RL values (<-10 dB) in the frequency range of 1.76-10.86 GHz for an absorber thickness of 1.5-6.0 mm, which reveal a great opportunity in microwave absorption applications operating at S-band and above.182