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

稀土铁金属间化合物中铁亚晶格磁各向异性的研究

• 批准号: 06805003
• 负责人: KAMIMORI Tatsuo
• 金额: $ 1.28万
• 依托单位: EHIME UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1994
• 资助国家: 日本
• 起止时间: 1994 至 1995
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-06805003/
• 关键词: Magnetism; Intermetallic compound; iron sub lattice; Curie temperature; Magnetic anisotropy; preferential site occupation

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.

选择非磁性钇(Y)作为R，其中R=稀土元素，并用非磁性元素替代铁，研究了R_2Fe_<17>中铁亚晶格的磁性。硅（Si）。铝（Al）和镓（Ga）可以广泛替代铁。发现它们不会随机替代铁，而是优先替代特定位点。课题组长发现优先位点占据与化合物的居里温度性质密切相关。课题组长尝试用锌（Zn）代替。日耳曼尼努（Ge）。铟 (In)。 Fe 为锡 (Sn) 和铊 (Tl)。结果发现它们不能替代化合物中的铁。然而，首席研究员发现锆（Zr）和铪（Hf）可以替代Y。这种替代改变了晶格参数。这一发现可以将晶格尺寸效应和择位占据效应对磁性分开。Y_2Fe_<17>的易磁化方向在c面，不适合应用，不会因取代而改变为c轴。然而发现Si的替代。 Fe中的Al和Ga减少了不合适的各向异性。

项目成果

K.Koyama: "Effect of nitrogenation on magnetism for Y_2 Fe_<17-x>(SiAl)" Journal of Magnetism and Magnetic Materials. (in press). (1995)

K.Koyama：“氮化对 Y_2 Fe_<17-x>(SiAl) 磁性的影响”《磁性与磁性材料杂志》。

K.Koyama, Y.Mori, M.Asano, T.Kamimori, H.Tange and M.Goto: "Effect of nitrogenation on magnetism for Y_2Fe_<17-k> (SiAl)_k" Journal of Magnetism and Magnetic Materials. Vol.140-144. 969 (1995)

K.Koyama、Y.Mori、M.Asano、T.Kamimori、H.Tange 和 M.Goto：“氮化对 Y_2Fe_<17-k> (SiAl)_k 磁性的影响”《磁性与磁性材料杂志》。

K. Koyama: "Effect of nitrogenation on magnetism for Y_2Fe_<17-X>(SiAl)_X" Journal of magnetism and magnetic materials. 140-144. 969-970 (1995)

K. Koyama：“氮化对 Y_2Fe_<17-X>(SiAl)_X 磁性的影响”《磁性与磁性材料杂志》。