The BaAl₄ prototype structure and its derivatives have been identified to host several topological quantum materials and noncentrosymmetric superconductors. Single crystals up to ∼3 mm × 3 mm × 5 mm of Ln₂Co₃Ge₅ (Ln = Pr, Nd, and Sm) are obtained via flux growth utilizing Sn as metallic flux. The crystal structure is isostructural to the Lu₂Co₃Si₅ structure type in the crystallographic space group C2/c. The temperature-dependent magnetization indicates magnetic ordering at 30 K for all three compounds. Pr₂Co₃Ge₅ and Nd₂Co₃Ge₅ exhibit complex magnetic behavior with spin reorientations before ordering antiferromagnetically around 6 K, whereas Sm₂Co₃Ge₅ shows a clear antiferromagnetic behavior at 26 K. The structures and properties of Ln₂Co₃Ge₅ (Ln = Pr, Nd, and Sm) are compared to those of the ThCr₂Si₂ and BaNiSn₃ structure types. Herein, we present the optimized crystal growth, structure, and physical properties of Ln₂Co₃Ge₅ (Ln = Pr, Nd, and Sm).

中文翻译：

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它在 BaAl4 家族中运行：将中间孩子 Ln2Co3Ge5（Ln = Pr、Nd 和 Sm）的结构和特性与其兄弟 LnCo2Ge2 和 LnCoGe3 相关联

BaAl ₄原型结构及其衍生物已被确定为承载几种拓扑量子材料和非中心对称超导体。通过使用 Sn 作为金属助熔剂的助熔剂生长，可以获得高达 3 mm × 3 mm × 5 mm 的 Ln ₂ Co ₃ Ge ₅（Ln = Pr、Nd 和 Sm）的单晶。晶体结构与晶体空间群C 2/ c 中的Lu ₂ Co ₃ Si ₅结构类型同构。随温度变化的磁化强度表明所有三种化合物在 30 K 时的磁序。Pr ₂ Co ₃ Ge ₅和 Nd₂ Co ₃ Ge ₅在 6 K 附近呈反铁磁性排序之前表现出复杂的磁性行为和自旋重定向，而 Sm ₂ Co ₃ Ge ₅在 26 K 显示出明显的反铁磁性。 Ln ₂ Co ₃ Ge ₅ (Ln = Pr)的结构和性质、Nd和Sm)与ThCr ₂ Si ₂和BaNiSn ₃结构类型的那些进行比较。在此，我们介绍了 Ln ₂ Co ₃ Ge ₅ (Ln = Pr、Nd 和 Sm)的优化晶体生长、结构和物理特性。