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The crystal structure of AuMnSn

机译:AuMnSn的晶体结构

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The crystal structure and magnetic properties of AuMnSn have been studied on single crystals and powders. AuMnSn has a narrow composition range between Au35Mn31Sn34 and Au33Mn35Sn32. The unit cell, as determined by single crystal X-ray diffraction, is cubic (space group F43m) with a=632.33(1) pm at 150(2) K, Au in 4c, Mn in 4b and Sn in 4a. There is a certain degree of statistical distribution of Mn and Sn over the 4a and 4b positions, corresponding to 0.10-0.15 Mn on the Sn site and vice versa (the spread reflects the dependence on the different model constraints imposed during the refinements). The crystal structure of AuMnSn is of the AlLiSi type (AgAsMg type when the origin is shifted). Magnetization measurements show that AuMnSn takes a ferromagnetic stale from 5 K to above room temperature. AuMnSn is a typical soft ferromagnetic material with a very narrow hysteresis loop and low saturation field (ca. 0.8 T at 5 K). The saturation moment per Mn atom is 3.8 mu(B) (+/-0.1 mu(B) according to repeated measurements) at 5 K and the extrapolated Curie temperature is ca. 600 K. (C) 1998 Published by Elsevier Science S.A. [References: 26]
机译:已经对单晶和粉末研究了AuMnSn的晶体结构和磁性。 AuMnSn在Au35Mn31Sn34和Au33Mn35Sn32之间具有狭窄的组成范围。通过单晶X射线衍射确定的晶胞为立方晶(空间群F43m),在150(2)K时a = 632.33(1)pm,在4c中为Au,在4b中为Mn,在4a中为Sn。在4a和4b位置有一定程度的Mn和Sn的统计分布,对应于Sn部位的0.10-0.15 Mn,反之亦然(分布反映了对细化过程中施加的不同模型约束的依赖性)。 AuMnSn的晶体结构为AlLiSi型(原点移动时为AgAsMg型)。磁化测量表明,AuMnSn在5 K到室温以上的温度下都处于铁磁性陈旧状态。 AuMnSn是一种典型的软铁磁材料,具有非常窄的磁滞回线和低饱和磁场(在5 K时约为0.8 T)。在5 K时,每个Mn原子的饱和力矩为3.8 mu(B)(根据重复测量,为+/- 0.1 mu(B)),外推居里温度为。 600 K.(C)1998由Elsevier Science S.A.出版[参考文献:26]

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