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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 >Superconducting properties of solid solutions (Mo6Se8)Pbx and PbxMo6Se8 in the ternary system Pb-Mo-Se
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Superconducting properties of solid solutions (Mo6Se8)Pbx and PbxMo6Se8 in the ternary system Pb-Mo-Se

机译：三元体系Pb-Mo-Se中固溶体（Mo6Se8）Pbx和PbxMo6Se8的超导性质

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摘要

The homogeneity regions of the superconductingphases (Mo6Se8)Pb and Pb~Mo6Se8 were explored along thesection [Mo3Se4-Pb 1Mo 6Se8] in the Pb-Mo-Se ternary system. It isshown, through X-ray diffraction and a.c. susceptibility methods,that a "doped binary" region (i.e., (Mo6Se8)Pbx) exists for x≤0.1,while the ternary Chevrel phase PbxMo6Se8 exists between x >0.7and x≤1.05. In the first region, the superconducting temperatureT_ increases from 6.45 K (x = 0) up to 7.15 K; in the latter, thehighest superconducting temperature (Th = 7.2 K) corresponds tolead-deficient samples (x = 0.75) decreasing linearly with x downto 4.35 K (x = 1.05). Our previous belief that the doped regimedepends only on steric effects (i.e., ionic size of the dopant) isreinforced with the present data.
机译：沿Pb-Mo-Se三元系中的[Mo3Se4-Pb 1Mo 6Se8]截面探索了超导相（Mo6Se8）Pb和Pb〜Mo6Se8的均质区域。通过X射线衍射和交流电显示磁化率方法是，对于x≤0.1，存在一个“掺杂的二进制”区域（即（Mo6Se8）Pbx），而在x> 0.7和x≤1.05之间，存在三元Chevrel相PbxMo6Se8。在第一区域中，超导温度T_从6.45 K（x = 0）升高到7.15 K;在后者中，最高的超导温度（Th = 7.2 K）对应于缺铅样品（x = 0.75），随x线性下降至4.35 K（x = 1.05）。我们以前的观点认为，掺杂数据仅取决于空间效应（即，掺杂剂的离子尺寸），这一点得到了当前数据的证实。

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