L. Romaka, Kh. Miliyanchyk, V. Romaka, L. Havela, Y. Stadnyk
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引用次数: 0
摘要
采用电弧熔化和873 K退火法制备了金属间化合物Dy6Ni2.43Sn0.5。通过x射线粉末衍射、差热分析和电子探针微量分析对其进行了表征。低温Dy6Ni2.43Sn0.5相的晶体结构属于正交Ho6Co2Ga结构类型(空间群Immm, a = 0.93116(1) nm, b = 0.94993(1) nm, c = 0.98947(1) nm)。晶体结构的改进表明，与公式Dy6Ni2.43Sn0.5所对应的理想6:2:1化学计量比存在偏差。它表现出一系列的磁相变;反铁磁有序在60k时形成，而进一步的有序磁相变在较低温度下发生。
Structural studies and magnetism of Dy6Ni2.43Sn0.5 stannide
Intermetallic compound Dy6Ni2.43Sn0.5 was prepared by arc melting and annealing at 873 K. It was characterized by X-ray powder diffraction, differential thermal analysis, and electron probe microanalysis. The crystal structure of low temperature Dy6Ni2.43Sn0.5 phase belongs to the orthorhombic Ho6Co2Ga structure type (space group Immm, a = 0.93116(1) nm, b = 0.94993(1) nm, c = 0.98947(1) nm). Crystal structure refinements showed the deviation from the ideal 6:2:1 stoichiometry corresponding to the formula Dy6Ni2.43Sn0.5. It exhibits a sequence of magnetic phase transitions; antiferromagnetic ordering sets in at 60 K, while further order-order magnetic phase transitions take place at lower temperatures.
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