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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.
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Authors (5)
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K. Baroudi
- Princeton University Department of Chemistry
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J.w. Krizan
- Princeton University Department of Chemistry
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R.j. Cava
- Princeton University Department of Chemistry
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Details
- Category:
- Articles
- Type:
- artykuł w czasopiśmie wyróżnionym w JCR
- Published in:
-
JOURNAL OF ALLOYS AND COMPOUNDS
no. 649,
pages 906 - 909,
ISSN: 0925-8388 - Language:
- English
- Publication year:
- 2015
- Bibliographic description:
- Klimczuk T., Baroudi K., Krizan J., Kozub A., Cava R.: Superconductivity in the niobium-rich compound Nb5Se4// JOURNAL OF ALLOYS AND COMPOUNDS. -Vol. 649, (2015), s.906-909
- DOI:
- Digital Object Identifier (open in new tab) 10.1016/j.jallcom.2015.06.281
- Verified by:
- Gdańsk University of Technology
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