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首页> 外文期刊>Superconductor Science & Technology >Hydrostatic pressure effect on the superconducting properties of BaBi3 and SrBi3 single crystals
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Hydrostatic pressure effect on the superconducting properties of BaBi3 and SrBi3 single crystals

机译:对Babi3和Srbi3单晶超导性能的静压压力影响

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We demonstrate the superconducting properties of,. and hydrostatic pressure effect on, BaBi3 and SrBi3 superconductors. We measure the dc magnetic susceptibility under hydrostatic pressure for both compounds, which shows a positive pressure coefficient of dT(c)/dP = 1.22 K GPa(-1) for BaBi3 and a negative pressure coefficient of dT(c)/dP = -0.43 K GPa(-1) for SrBi3. The normal state electrical resistivity shows that both compounds are highly metallic in nature. The upper critical fields H-c2 evaluated by resistivity under magnetic fields rho(T, H) are 22 kOe for BaBi3 and 2.9 kOe for SrBi3. A specific heat jump of Delta C-e/gamma T-c = 1.05 suggests weak coupling superconductivity in BaBi3, whereas Delta C-e/gamma T-c = 2.08 for SrBi3 is higher than the Bardeen-Cooper- Schrieffer theory value of 1.43, indicating a strong coupling superconductor.
机译:我们证明了超导性质。 和静水压效应对,Babi3和Srbi3超导体。 我们测量两种化合物的静压压力下的直流磁化率,其显示Babi3的DT(c)/ dp = 1.22k gpa(-1)的正压系数和dt(c)/ dp =的负压系数。 SRBI3的0.43 k GPA(-1)。 正常状态电阻率表明,两种化合物本质上是高度金属的。 通过磁场下的电阻率评估的高临界领域H-C2 rho(t,h)为Babi3和2.9 koe的22ko,用于srbi3。 Delta C-E / Gamma T-C = 1.05的特定热跃升表明Babi3中的较弱的耦合超导性,而SRBI3的Delta C-E / Gamma T-C = 2.08高于Bardeen-Coper-Schriefer理论值为1.43,表示强耦合超导体。

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