一、引言 自Sagawa等于1983年发现Nd2Fe1~4B永磁体后不久,人们又开始了另一类新的铁基稀土永磁体的研究工作,其中具有ThMn12晶体结构的所谓1:12磁体吸引最广泛的兴趣,它们的一般成份可写为R_E(Fe,Tm)12,式中R_E是稀土元素,Tm可为Mo、Ti、V、Cr、Si等。含Sm的化合物特别显示出单轴各向异性,其各向异性场高达90KO_e[Sm(Fe,Mo)12]。尽管如此,用 I. INTRODUCTION Shortly after the discovery of Nd2Fe1 ~ 4B permanent magnets by Sagawa in 1983, another new class of iron-based rare earth permanent magnets was started. The so-called 1: 12 magnet with ThMn12 crystal structure attracted the most attention Interest, their general composition can be written as R_E (Fe, Tm) 12, where R_E is a rare earth element, Tm can be Mo, Ti, V, Cr, Si and so on. In particular, Sm-containing compounds exhibit uniaxial anisotropy with an anisotropy field of up to 90 KOe [Sm (Fe, Mo) 12]. However, use