中国计量大学学报2026，Vol.37Issue(1)：109-114,6.DOI:10.3969/j.issn.2096-2835.2026.01.012
Chevrel相化合物SnMo6S8超导电性的研究
Chevrel phase compound SnMo6S8 superconductivity research
赖少东 1焦志伟 1周易 1万阿敏 1张佳龙 1贺俊琦 1曾龙海1
作者信息
- 1. 中国计量大学 理学院,浙江 杭州 310018
- 折叠
摘要
Abstract
Aims:This paper aims to study the superconductivity of Chevrel-phase compound SnMo6S8 by measuring its electrical resistivity and magnetic susceptibility.Methods:SnMo6S8 polycrystalline samples were prepared using the solid-state reaction method.The structure of the samples was characterized by X-ray diffraction.The resistivity and magnetization measurements were carried out using a physical property measurement system(quantum design PPMS-9 T)and a magnetic property measurement system(quantum design MPMS-7T),respectively.The resistivity above the critical temperature Tc was fitted by an empirical formulaρ=ρ0+b×T+d×e-T0/T.The upper and lower critical fields were fitted by the Ginzburg-Landau(GL)formula and an empirical model HTc1=H0c1×[1-(T/Tc)α]β.Results:The space group of SnMo6S8 polycrystals was R-3,with lattice constants a=b=9.26 Å(1 Å=10-10 m),and c=11.34 Å.The superconducting transition temperature Tc=(10.5±0.1)K was obtained through resistivity measurements.The lower critical field was:H0c1=61255 A/m;and the upper critical field was:μ0 H0c2=36.01 T.Conclusions:Through the fitting analysis of the upper critical field,it can be inferred that SnMo6S8 exhibits a second-order phase transition characteristic during the superconducting phase transition and possesses weak spin-orbit coupling.Moreover,the upper critical field of this material exceeds the Pauli limit,which could be due to strong spin-orbit scattering.The fitting of the lower critical field withα=2.23 andβ=0.64 indicates that the superconducting phase transition may be related to the multiband superconductivity mechanism.The aforementioned results provide a new perspective for a deeper understanding of the superconductivity characteristics and the underlying physical mechanisms of SnMo6S8.关键词
Chevrel 相/SnMo6S8 样品/超导电性Key words
Chevrel phase/SnMo6S8 sample/superconductivity分类
数理科学引用本文复制引用
赖少东,焦志伟,周易,万阿敏,张佳龙,贺俊琦,曾龙海..Chevrel相化合物SnMo6S8超导电性的研究[J].中国计量大学学报,2026,37(1):109-114,6.
