Synthesis and Characterization of the Superconductor Mo_3Sb_7

• Authors: V. Tran , Z. Bukowski
• Languages of publication: EN

Abstracts

EN

We synthesized a polycrystalline sample of the superconductor Mo_3Sb_7 and characterized its basic properties by measurements of magnetization, electrical resistivity and specific heat. The measurements establish a superconducting phase transition at T_c=2.25 (0.05) K. In applied magnetic fields, the magnetization and resistivity show the behavior of type-II superconductor. From the specific heat measurement, the electronic specific heat coefficient,γ, specific heat jump at T_c, ΔC(T_c)/γT_c, and the Debye temperature Θ_D, are evaluated to be 34.5 mJ/(mol K^2), 1.56 and 283 K, respectively. From analysis of the specific heat data we suggest that this compound belongs to an intermediate strong coupling regime in the BCS context. The observed enhancement in theγ-value suggests a substantial contribution of Mo-4d-electrons to the density of states. Our experimental data do not support interpretation of superconductivity in Mo_3Sb_7 in terms of neither unconventional superconductivity or spin fluctuations proposed previously.

Keywords

EN

74.25.Bt; 74.70.-b

Discipline

• 74.70.-b: Superconducting materials other than cuprates(for cuprates, see 74.72.-h; for superconducting films, see 74.78.-w)
• 74.25.Bt: Thermodynamic properties

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2008
• Volume: 114
• Issue: 1
• Pages: 67-74

Dates

published

2008-07

received

2007-11-06

Contributors

author

V. Tran

• W. Trzebiatowski Institute of Low Temperature and Structure Research, Polish Academy of Sciences, P.O. Box 1410, 50-950 Wrocław, Poland

author

Z. Bukowski

• Laboratory for Solid State Physics, ETH Zűrich, 8093 Zűrich, Switzerland

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Identifiers

DOI

10.12693/APhysPolA.114.67