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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >New RniSn_4 compounds (R=rare earth): crystal structure of new LuNiSn_4 type, magnetic and transport properties
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New RniSn_4 compounds (R=rare earth): crystal structure of new LuNiSn_4 type, magnetic and transport properties

机译：新的RniSn_4化合物（R =稀土）：新型LuNiSn_4类型的晶体结构，磁性和传输性质

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摘要

A series of new RniSn_4 compounds (R=Gd-Tm,Lu) has been synthesized. The crystal structure of LuNiSn_4 hasbeen determined. It is a new structure type, described as acommensurate modulated structure with space group Ammm/(ddd)and lattice parameters a = 4.386 ?, b = 27.942 ? and c = 4.353 ?.The other investigated compounds have the same structure.Magnetization was measured in the temperature range 1.5-300 K,and, except for the Dy compound, the resistivity was studiedbetween 4 and 300 K. Moreover, the specific heat of the Er and Lucompounds was studied between 1.2 and 30 K. All compoundswith magnetic rare earths order anti-ferromagnetically below theirNéel temperature, which ranges from 3 K (R = Tm) to 27 K (R =Gd). Below T_N, metamagnetic transitions are observed. In thecompound with Er, the specific heat reveals that, immediatelybelow T_N = 8.8 K, there is a second transition at 8.5 K. Theintermediate phase is likely a modulated structure.
机译：合成了一系列新的RniSn_4化合物（R = Gd-Tm，Lu）。已经确定了LuNiSn_4的晶体结构。它是一种新的结构类型，描述为空间群为Ammm /（ddd）且晶格参数为a = 4.386？，b = 27.942？的相称调制结构。 c = 4.353？。其他研究的化合物具有相同的结构。在1.5-300 K的温度范围内测量了磁化强度，除Dy化合物外，还研究了4至300 K之间的电阻率。 Er和Lucompounds的研究范围为1.2到30K。所有具有磁性稀土的化合物在其Neel温度（范围从3 K（R = Tm）到27 K（R = Gd））以下时，反铁磁性排列。在T_N以下，观察到超磁跃迁。在含Er的化合物中，比热表明，紧随T_N = 8.8 K，在8.5 K处有第二个跃迁。中间相可能是调制结构。

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