Title: Structure and Magnetism of the New Cage-structured Compound HfMn$_{2}$Zn$_{20}$ Show Chinese title

Title: 新笼状化合物HfMn$_{2}$Zn$_{20}$的结构和磁性

Abstract: A new cage-structured compound - HfMn$_{2}$Zn$_{20}$ - belonging to the AB$_{2}$C$_{20}$ (A, B = transition or rare earth metals, and C = Al, Zn, or Cd) family of structures has been synthesized via the self-flux method. The new compound crystallizes in the space group Fd-3m with lattice parameter a = 14.0543(2) \r{A} (Z = 8) and exhibits non-stoichiometry due to Mn/Zn mixing on the Mn-site and an underoccupied Hf-site. The structure refines to Hf$_{0.93}$Mn$_{1.63}$Zn$_{20.37}$ and follows lattice size trends when compared to other HfM$_{2}$Zn$_{20}$ (M = Fe, Co, and Ni) structures. The magnetic measurements show that this compound displays a modified Curie-Weiss behavior with a transition temperature around 22 K. The magnetization shows no saturation, a small magnetic moment, and near negligible hysteresis, all signs of the itinerant magnetism. Show Chinese abstract

Abstract: 一种新的笼状结构化合物 - HfMn$_{2}$Zn$_{20}$ - 属于 AB$_{2}$C$_{20}$ (A, B = 过渡金属或稀土金属，C = Al、Zn 或 Cd) 结构家族，已通过自通量法合成。 新化合物结晶于空间群 Fd-3m，晶格参数 a = 14.0543(2) Å（Z = 8），由于 Mn 位点上的 Mn/Zn 混合和 Hf 位点的欠占据而表现出非化学计量性。 结构精炼为Hf$_{0.93}$Mn$_{1.63}$Zn$_{20.37}$，并与其它HfM$_{2}$Zn$_{20}$(M = Fe, Co, and Ni)结构相比，遵循晶格尺寸趋势。 磁性测量显示，该化合物表现出一种修改的居里-韦斯行为，转变温度约为22 K。磁化强度没有饱和，磁矩较小，滞后效应几乎可以忽略，这些都是巡游磁性的迹象。