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The high-pressure phase of CePtAl

机译:CePtAl的高压相

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摘要

The intermetallic aluminum compound HP-CePtAl was synthesized by arc melting of the elements with subsequent high-pressure/high-temperature treatment at 1620 K and 10.5 GPa in a multianvil press. The compound crystallizes in the hexagonal MgZn2-type structure (P6(3)/mmc) with lattice parameters of a = 552.7(1) and c = 898.8(2) pm refined from powder X-ray diffraction data. With the help of single crystal investigations (wR = 0.0527, 187 F-2 values, 13 variables), the proposed structure type was confirmed and the mixed Pt/Al site occupations could be refined. Magnetic susceptibility measurements showed a disappearance of the complex magnetic ordering phenomena, which are observed in NP-CePtAl.
机译:金属间化合物HP-CePtAl是在多砧压机中,通过电弧熔化,随后在1620 K和10.5 GPa下进行高压/高温处理,合成了金属间铝化合物HP-CePtAl。该化合物以六方MgZn2型结构(P6(3)/mmc)结晶,晶格参数为a = 552.7(1)和c = 898.8(2) pm,根据粉末X射线衍射数据提炼而成。在单晶研究(wR = 0.0527,187个F-2值,13个变量)的帮助下,确认了所提出的结构类型,并完善了Pt/Al混合位址占用。磁化率测量显示,在NP-CePtAl中观察到的复杂磁有序现象消失了。

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