【摘要】 用水冷铜舟高频感应炉制备化合物R₂Co_7-xFe_xB₃（R=Nd,Sm）,当x=0～3时,该化合物可形成六角结构,随Fe含量的增加,晶格常数α、c增大,居里温度T_c和室温时的比饱和磁矩σ₂,也明显增加,样品在磁场中取向前后的X射线衍射谱分析表明,该化合物具有单轴各向异性,易磁化轴在C-轴上,利用CL-16直流磁特性测试装置,测量了该化合物粉末样品室温时的内禀矫顽力_MH_c。更多还原

【Abstract】 R₂Co_7-xFe_xB₃（R=Nd, Sm） compounds are prepared by induction melting in water-cooled copper boat. When x=0～3, all compounds are of a hexagonal structure. Increase in the lattice parameters a and c, Curie temperature T_c, and specific magnetic moment σ_?（T=300K） were observed with iron substituting cobalt. According to the X-ray diffraction patterns of nonalligned powder sample and aligned powder sample, the compounds have obvious magnetic anisotropy H_?, and C-axis is the easy axis. The intrinsic coercivity_MH_c of these compounds （T=300K） is measured, by using CL-16 direct current magnetism measuring set.更多还原