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首页> 外文期刊>Superconductor Science & Technology >Substitution effects on superconducting and normal state properties in (Mo1-xTx)(3)Sb-7, where T = Ru and Fe
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Substitution effects on superconducting and normal state properties in (Mo1-xTx)(3)Sb-7, where T = Ru and Fe

机译:替代对(Mo1-XTX)(3)SB-7中的超导和正常状态特性的影响,其中T = Ru和Fe

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摘要

The effects of Ru- and Fe-doping on the physical properties of Mo3Sb7. were studied by measuring ac-susceptibility, dc-magnetization, electrical resistivity and specific heat. It is found that single-phased (Mo1-xRux)(3)Sb-7 and (Mo1-xFex)(3)Sb-7 samples are obtained for the concentrations x <= 0.1. In this concentration range, the lattice parameter shrinks with increasing dopant content. The substitution effects on the superconducting and normal state properties are completely different between two investigated systems. In the Ru-based solid solution alloys, the substitution enhances the superconducting parameters T-c and H-c2 and also benefits the spin-gap opening at T* similar to 50 K. In contrast, in the Fe-substituted samples, there is a depression of both T-c and H-c2, accompanied by vanishing spin-gap and low-dimensional magnetic correlation. The substitution of the Mo atoms by Ru and Fe atoms suppresses the cubic-tetragonal distortion, but presumably favours the magnetic field to induce a magnetic order below T*.
机译:ru-和Fe掺杂对Mo3SB7物理性质的影响。通过测量交流敏感,直流磁化,电阻率和特定热量来研究。发现,为浓度x <= 0.1获得单相位(MO1-XRUX)(3)SB-7和(MO1-XFEX)(3)SB-7样品。在该浓度范围内,晶格参数随着掺杂剂含量的增加而缩小。对超导和正常状态性质的替代效应在两个研究系统之间完全不同。在基于Ru的固溶合金中,取代增强了超导参数Tc和H-C2,并且还使T *类似于50k的旋转间隙开口。相反,在Fe-取代的样品中,存在抑郁症TC和H-C2两者都伴随着消失的旋转间隙和低维磁性相关性。通过Ru和Fe原子取代Mo原子抑制了立方四角变形,但可能有利于磁场诱导低于T *的磁场。

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