Pr3+-substituted W-type barium ferrite: Preparation and electromagnetic properties

Abstract The W-type ferrites doped with Pr 3+ , BaCoNiPr x Fe 16− x O 27 ( x =0–0.20), were prepared by a sol–gel method. The structure and electromagnetic properties of the samples are studied using powder X-ray diffraction, field emission scanning electron microscope, vibrating sample magnetometer and vector network analyzer. All the samples are hexagonal platelet-like W-type barium ferrite. These synthesized samples exhibit paramagnetism and strong magnetism. The saturation magnetization ( Ms ) increases with the increase of Pr 3+ content. The real part of complex permittivity ( e′ ) decreases and the imaginary part ( e″ ) increases with Fe 3+ replaced by Pr 3+ . The imaginary part of complex permittivity ( μ″ ) increases and the real part ( μ′ ) decreases after Pr 3+ is doped. Furthermore, the doped Pr 3+ improves the microwave absorbency.