Interstitial doping induced superconductivity at 15.3 K in Nb5Ge3 compound
| Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
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| Data(s) |
06/11/2013
06/11/2013
2012
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| Resumo |
It is reported superconductivity in Nb5Ge3C0.3, an interstitial carbide compound. The temperature dependence of the electrical resistivity, ac-susceptibility, and heat capacity (HC) indicate that a bulk type-II superconductivity appears at T-C - 15.3 K. Magneto-resistance measurements suggest an upper critical field of B-C2 similar to 10.6 T and a coherence length of xi similar to 55 angstrom at zero temperature. Neutron diffraction analyzes locate the carbon atoms at the interstitial 2b site of the Mn5Si3 type-structure. Heat capacity data below T-C are well described by BCS theory. The size of the jump at T-C is in good agreement with the superconducting volume fraction observed in susceptibility measurements. A Debye temperature and Sommerfeld constant were also extracted from heat capacity data as 343 K and 34 mJ/mol K-2, respectively. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4730611] FAPESP FAPESP [2004/13267-6, 2005/01257-1, 2009/142524-6, 2009/54001-2, 2009/00610-8] CNPq [309084/2010-5] CNPq |
| Identificador |
JOURNAL OF APPLIED PHYSICS, MELVILLE, v. 111, n. 12, supl., Part 3, pp. 799-813, 42156, 2012 0021-8979 http://www.producao.usp.br/handle/BDPI/42348 10.1063/1.4730611 |
| Idioma(s) |
eng |
| Publicador |
AMER INST PHYSICS MELVILLE |
| Relação |
JOURNAL OF APPLIED PHYSICS |
| Direitos |
restrictedAccess Copyright AMER INST PHYSICS |
| Palavras-Chave | #RESISTIVITY #PHASE #TEMPERATURE #SATURATION #METALS #SYSTEM #NBGE2 #HEAT #PHYSICS, APPLIED |
| Tipo |
article original article publishedVersion |
