Fe2W型铁氧体BaFe2-x2+CoxFe163+O27(x=0.0~0.8)的微观结构和磁性

用固相法制备Fe₂W型铁氧体BaFe_2-x²⁺Co_xFe₁₆³⁺O₂₇(x=0.0~0.8)，采用X射线衍射仪(XRD)、扫描电子显微镜(SEM)、红外光谱仪(FT-IR)和振动样品磁强计(PPMS-VSM)等手段分析其物相组成、结构和磁性并使用Reitveld拟合分析晶体结构，研究了Co²⁺部分取代Fe²⁺的Fe₂W型铁氧体的微观结构和磁性。结果表明：所有样品都是纯相铁氧体BaFe_2-x²⁺Co_xFe₁₆³⁺O₂₇。样品具有W铁氧体结构，晶粒呈良好的六角形结构且分布均匀。用 Co取代能明显提高Fe₂W型铁氧体300 K的饱和磁化强度(M_s)。

Microstructure and Magnetic Properties of Fe2W-type Ferrites BaFe2-x2+CoxFe163+O27 (x=0.0~0.8)

Fe₂W-type ferrite BaFe_2-x²⁺Co_xFe₁₆³⁺O₂₇(x=0.0~0.8) was prepared by solid phase method, and of which the microstructure and magnetic properties were characterized by means of X-ray diffractometer (XRD), scanning electron microscope (SEM), infrared spectrometer (FT-IR) and vibrating sample magnetometer (PPMS-VSM), as well as Reitveld fitting method. The results show that all samples are single phase BaFe_2-x²⁺Co_xFe₁₆³⁺O₂₇ without residual α-Fe₂O₃. The grain has a good hexagonal structure and the particle size distribution is uniform. Last but not least, the partial substitution of Co²⁺ for^{Fe2+can significantly improve the saturation magnetization (M_s) at 300 K for Fe₂W-type ferrite BaFe_2-x2+Co_xFe₁₆3+O₂₇.}