INVESTIGATION ON MAGENTIC ANISOTROPY OF IRON SUB LATTICE IN RARE EARTH IRON INTERMETALLIC COMPOUNDS

选择非磁性的Y(Y)作为R，并用非磁性元素替代铁，研究了R_2Fe_(17)&GT；中的铁亚晶格的磁性。硅(Si)。铝(Al)和镓(Ga)可以在很大范围内替代铁。结果表明，它们不是随机替代铁，而是优先替代特定的位点。首席调查员发现，优先占据的位置与化合物的居里温度性质密切相关。首席调查员试图用锌来替代锌。日耳曼尼努(Germaninu)。铟(In)。铁的锡(锡)和铊(Tl)。研究发现，它们不能替代化合物中的铁。然而，首席研究人员发现，锆(Zr)和氢(Hf)可以替代Y。替代改变了晶格参数。这一发现可以分离晶格尺寸效应和择优占位效应对磁体的影响，Y_2Fe_(17)&Gt；的易磁化方向是c-面上的，这是不适合应用的，不会因为替代而改变到c-轴。然而，研究发现，Si的取代是最重要的。Al和Ga对Fe降低了不适宜的各向异性。

The magnetism of iron sub lattice in R_2Fe_<17> was studied with selecting non magnetic yttrium (Y) as R.where R=rare earth elements, and substitution of non magnetic elements for iron. Silicon (Si). Aluminium (Al) and Gallium (Ga) can substitute for iron in wide range. It was found that they do not substitute for iron random but they substitute specific site preferentially. The head investigator found that the preferential site occupation closely related to the properties of the Curie temperature of the compounds.The head investigator tried to substitute Zinc (Zn). Germaninu (Ge). Indium (In). Tin (Sn) and Thallium (Tl) for Fe. It was found that they can not substitute for iron in the compounds. However, the head investigator found that Zirconium (Zr) and Hafnium (Hf) can substitute for Y.The substitution changes the lattice parameters. This discovery can separates the lattice dimension effect and the preferential site occupation effect on magnetism.The easy magnetization direction of Y_2Fe_<17> is on c-plane, which is not agree for application, does not change to c-axis by the substitution. However it was found that the substitution of Si. Al and Ga for Fe reduce the unsuitable anisotropy.