Pr-substituted W-type barium ferrite: Preparation and electromagnetic properties

The W-type ferrites doped with Pr³⁺, BaCoNiPr_xFe_16−xO₂₇ (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 Pr³⁺ content. The real part of complex permittivity (ε′) decreases and the imaginary part (ε″) increases with Fe³⁺ replaced by Pr³⁺. The imaginary part of complex permittivity (μ″) increases and the real part (μ′) decreases after Pr³⁺ is doped. Furthermore, the doped Pr³⁺ improves the microwave absorbency.