A. Yu. Makhaneva, E. Yu. Zakharova, S. N. Nesterenko, S. M. Kazakov, A. N. Kuznetsov
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引用次数: 0
Abstract
New platinum-based intermetallic Pt5Mn2Ge was obtained as a bulk sample using arc-melting of the elements with subsequent high-temperature annealing. The structure of the compound was refined using full-profile Rietveld method. Pt5Mn2Ge is isotypic to recently discovered Pt5Mn2Si and crystallizes in the Rh5Ga2As structure type, space group Pbam, a = 5.3791(5) Å, b = 10.982(1) Å, c = 4.0201(3) Å, Z = 2, an ordered variation of the Rh5Ge3 structure type. DFT calculations predict Pt5Mn2Ge to be a metallic conductor. Magnetic measurements show that the compound has a magnetic transition below ca. 100 K, most likely attributed to ferrimagnetic ordering. This compound is only the second one reported in the Pt–Mn–Ge system.
采用电弧熔炼和高温退火法制备了新型铂基金属间化合物Pt5Mn2Ge。采用全剖面Rietveld法对化合物的结构进行了细化。Pt5Mn2Ge与最近发现的Pt5Mn2Si是同型的，结晶为Rh5Ga2As结构类型，空间群pham， a = 5.3791(5) Å， b = 10.982(1) Å， c = 4.0201(3) Å， Z = 2，是Rh5Ge3结构类型的有序变异。DFT计算预测Pt5Mn2Ge为金属导体。磁性测量表明，该化合物的磁跃迁低于约100 K，很可能归因于铁磁有序。该化合物是Pt-Mn-Ge体系中报道的第二种化合物。
期刊介绍：
Russian Journal of Inorganic Chemistry is a monthly periodical that covers the following topics of research: the synthesis and properties of inorganic compounds, coordination compounds, physicochemical analysis of inorganic systems, theoretical inorganic chemistry, physical methods of investigation, chemistry of solutions, inorganic materials, and nanomaterials.
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