A ternary compound Al3CoNd2 was synthesized and its crystal structure parameters were determined by the Rietveld refinement method based on powder X-ray diffraction data. Results show that the compound crystallizes in the MgCu2-type structure (cubic Laves C15 phase, space group $Fd\bar{3}m$), with the lattice parameter of a = 7.8424(2) Ǻ, unit-cell volume of V = 482.33 Å3, and calculated density of Dcalc = 5.90 g.cm−3. The residual factors converge to Rp = 0.1024 and Rwp = 0.1287. The reference intensity ratio value obtained experimentally is 3.03. Magnetic susceptibility measurements indicate an agreement with the Curie–Weiss law in the temperature range of 385–450 K, and paramagnetic Curie temperature of θp = 379.9 K. Both rare-earth elements and cobalt ions contribute to the paramagnetic moment. The saturation magnetic moment and magnetic hysteresis loop were measured for the Al3CoNd2 compound at various temperatures. Results show that the saturation magnetic moment value decreases with an increase in temperature and the compound becomes a ferromagnet below the Curie temperature Tc.

中文翻译：

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三元Al3CoNd2化合物的晶体结构和磁性

三元化合物Al3条件2基于粉末 X 射线衍射数据，通过 Rietveld 精修法合成并确定其晶体结构参数。结果表明，该化合物在 MgCu 中结晶2型结构（立方 Laves C15 相，空间群$Fd\bar{3}m$)，晶格参数为一种= 7.8424(2) Ǻ, 的晶胞体积五= 482.33 埃3, 和计算的密度D计算= 5.90 克.厘米-3. 剩余因子收敛到Rp= 0.1024 和Rwp= 0.1287。实验得到的参考强度比值为3.03。磁化率测量表明在 385-450 K 的温度范围内符合居里-魏斯定律，顺磁居里温度为θp= 379.9 K。稀土元素和钴离子都对顺磁矩有贡献。测量铝的饱和磁矩和磁滞回线3条件2在不同温度下复合。结果表明，饱和磁矩值随着温度的升高而降低，且化合物在居里温度以下变为铁磁体吨C.