Synthesis, magnetic and microwave absorbing properties of core-shell structured MnFe2O4/TiO2 nanocomposites

The core-shell MnFe2O4–TiO2 nano-composites were prepared by hydrolysis of titanium butoxide precursor in the presence of MnFe2O4 nanoparticles that were synthesized via the pyrolysis of polyacrylate salt precursor prepared by in situ polymerization of the metal salts and acrylate acid. The magnetic properties of the MnFe2O4 and MnFe2O4–TiO2 composites measured at the maximum magnetic field of 10 kOe and room temperature exhibited a super-paramagnetic behavior. The complex permittivity and permeability of MnFe2O4 and MnFe2O4–TiO2 composites measured in the microwave frequency range of 2–10 GHz showed that the microwave absorption properties of the MnFe2O4–TiO2 composites were higher than that of MnFe2O4.