自1990年Coey等通过气相掺氮法制备了R_2Fe_(17)N_x化合物,使R_2Fe_(17)间化物磁性能得到很大改善,由此引起有关科学家的广泛兴趣,近年研究结果表明Sm_2Fe_(17)N_x具有优良的内禀磁性,但除Sm外,其余稀土元素构成的2:17型氮化物的易磁化方向却为易面;加之Sm又是价格昂贵的稀土元素,这就大大地限制了它的应用.为此人们进一步寻找既能降低成本,又具有较高的磁性能的途径.本文用X射线衍射,磁测量和M(?)ssbauer谱实验方法系统地研究了金属间化物(Sm_(1-x)Pr_x)_2Fe_(17)及其氮化物的内禀磁性能及其微观机制,揭示了Pr替代Sm对上述氮化物磁性能和微观机制的影响. Since 1990, Coey and other prepared by gas-phase nitrogen R 2 Fe 17 N x compounds, the R 2 Fe 17 intermetallics greatly improved the magnetic properties, which attracted widespread interest of scientists, recent research results show that Sm 2 Fe 17, N_x has excellent intrinsic magnetic properties, but except for Sm, the easy-magnetization direction of the remaining 2:17 nitrides of rare earth elements is easy-to-surface. In addition, Sm is an expensive rare earth element, which greatly limits its Therefore, people are looking for ways to reduce both cost and magnetism.In this paper, the intermetallics (Sm_ (I) 1-x) Pr_x) _2Fe_ (17) and their nitrides and their microscopic mechanisms revealed the effect of Pr substitution on the magnetic properties and microscopic mechanisms of the above nitrides.