Preparation and properties of Pr doped Ba ferrite/polypyrrole composite film

Pr-doped Ba ferrite composite film was prepared by a sol-gel method and an in situ polymerization method, respectively. The structure, morphologies, magnetic properties and microwave absorption properties of the samples were characterized using X-ray diffractometer (XRD), Fourier transform infrared spectrometer (FTIR), scanning electron microscope(SEM), vibrating sample magnetometer (VSM) and magnetic vector network analyzer. The results show that the saturation magnetization (M_s) and the remanent magnetization (M_r) of the composite film are lower than that of Ba Ferrite film, but the coercivity force (H_c) of the composite film is higher than that of Ba Ferrite film. Pr doped Ba ferrite/polypyrrole composite film has both dielectric loss and magnetic loss, which is beneficial to widen microwave band and improve microwave absorption properties.