Abstract
Abstract The niobium rich selenide compound Nb5Se4 was synthesized at ambient pressure by high-temperature solid-state reaction in a sealed Ta tube. Resistivity and heat capacity measurements reveal that this compound is superconducting, with a Tc = 1.85K. The electronic contribution to the specific heat γ and the Debye temperature are found to be 18.1 mJmol-1K-2 and 298 K respectively. The calculated electron-phonon coupling constant λep = 0.5 and the ΔCp/γTc = 1.42 ratio imply that Nb5Se4 is a weak coupling BCS superconductor. The upper critical field and coherence length are found to be 1.44 T and 15.1 nm, respectively.
Original language | English (US) |
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Article number | 34899 |
Pages (from-to) | 906-909 |
Number of pages | 4 |
Journal | Journal of Alloys and Compounds |
Volume | 649 |
DOIs | |
State | Published - Aug 4 2015 |
All Science Journal Classification (ASJC) codes
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
- Materials Chemistry
Keywords
- Heat capacity
- Solid state reaction
- Superconductors
- X-ray diffraction