Abstract The isothermal section of the Ho-Ni-Si system at 773 K was constructed by X-ray powder diffraction (XRD) in this work. The system contains sixteen known type structure compounds TiNiSi-type HoNiSi, BaAl4-type HoNi2Si2, CeNiSi2-type HoNiSi2, U2Co3Si5-type Ho2Ni3Si5, SmNiGe3-type HoNiSi3, Ce3Ni6Si2-type Ho3Ni6Si2, ThMn12-type HoNi10Si2, YPd2Si-type HoNi2Si, YNi5Si3-type HoNi5Si3, YNi4Si-type HoNi4Si, Gd3NiSi2-type Ho3NiSi2, YNi6Si6-type HoNi6Si6, AlB2-type Ho2NiSi3, AlB2-type Ho3Ni2Si4, AlB2-type Ho4NiSi7, Gd3Ru4Al12-type Ho8Ni31Si11, and one unknown type structure compound Ho5Ni2Si3. At the same time, one unknown structure new phase Ho37Ni3Si60 was observed. In ternary compounds, Ho2NiSi3 and Ho4NiSi7 have the solid solution phenomena; the solid solution ranges are about Ho33.3Ni18.7-9.7Si∼48.0-57.0 and Ho33.Ni∼8.3-2.6Si∼58.3-64.1, respectively. At the same time, quasi-binary solid solutions were detected at 773 K for Ho2Ni17, HoNi5, Ho2Ni7, HoNi3, HoNi2, HoNi, HoSi. Other binary compounds of the Ho-Ni-Si system do not show any visible solubility. The magnetic property studies show that Ho3NiSi2 compound has two successive magnetic phase transitions in a low field: a spin-reorientation transition at TSR = 10 K and a second order ferromagnetic (FM) - paramagnetic (PM) transition at Tc = 37 K.

中文翻译：

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Ho3NiSi2合金的粉末X射线衍射和磁性能研究Ho-Ni-Si三元相图的773 K等温截面

摘要 在这项工作中，通过 X 射线粉末衍射 (XRD) 构建了 Ho-Ni-Si 系统在 773 K 的等温截面。该体系包含十六种已知类型的结构化合物 TiNiSi-型 HoNiSi、BaAl4-型 HoNi2Si2、CeNiSi2-型 HoNiSi2、U2Co3Si5-型 Ho2Ni3Si5、SmNiGe3-型 HoNiSi3、Ce3Ni6Si2-型 Ho3Ni6Si2、ThMn12-型 HoNi12-Si2、YP5 HoNi5Si3型、YNi4Si型HoNi4Si、Gd3NiSi2型Ho3NiSi2、YNi6Si6型HoNi6Si6、AlB2型Ho2NiSi3、AlB2型Ho3Ni2Si4、AlB2型Ho4NiSi7、Gd3Ru4Al12型Ho8Ni31Si1和一种未知结构的化合物。同时观察到一种未知结构的新相Ho37Ni3Si60。在三元化合物中，Ho2NiSi3和Ho4NiSi7有固溶现象；固溶范围约为Ho33.3Ni18.7-9.7Si∼48.0-57.0和Ho33.Ni∼8.3-2.6Si∼58.3-64.1，分别。同时，在 773 K 下检测到 Ho2Ni17、HoNi5、Ho2Ni7、HoNi3、HoNi2、HoNi、HoSi 的准二元固溶体。Ho-Ni-Si 系统的其他二元化合物没有显示任何可见的溶解度。磁性研究表明，Ho3NiSi2 化合物在低场中具有两个连续的磁性相变：TSR = 10 K 处的自旋-重定向转变和 Tc = 37 K 处的二阶铁磁 (FM) - 顺磁 (PM) 转变。