| Full text | |
| Author(s): |
Bortolozo, A. D.
[1, 2]
;
dos Santos, C. A. M.
[1]
;
Jardim, R. F.
[3]
;
Ritter, C.
[4]
;
Devishvili, A.
[4]
;
Rotter, M.
[5]
;
Gandra, F. G.
[6]
;
Machado, A. J. S.
[1]
Total Authors: 8
|
| Affiliation: | [1] Univ Sao Paulo, Escola Engn Lorena, BR-12600970 Lorena, SP - Brazil
[2] Univ Fed Itajuba, BR-35903087 Itabira, MG - Brazil
[3] Univ Sao Paulo, Inst Fis, BR-05315970 Sao Paulo - Brazil
[4] Inst Max Von Laue Paul Langevin, F-38042 Grenoble - France
[5] Univ Oxford, Clarendon Lab, Oxford OX1 3PU - England
[6] Univ Estadual Campinas, Inst Fis, BR-13083970 Campinas, SP - Brazil
Total Affiliations: 6
|
| Document type: | Journal article |
| Source: | Journal of Applied Physics; v. 111, n. 12 JUN 15 2012. |
| Web of Science Citations: | 5 |
| Abstract | |
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] (AU) | |
| FAPESP's process: | 09/54001-2 - Acquisition of cryogen-free equipment for the characterization of magnetic properties by vibrating sample magnetometry |
| Grantee: | Carlos Alberto Moreira dos Santos |
| Support Opportunities: | Multi-user Equipment Program |
| FAPESP's process: | 09/00610-8 - Investigation of magnetism and superconductivity in the new alloy of Fe-Se-X and Mg-Ce-X interstitial system |
| Grantee: | Ausdinir Danilo Bortolozo |
| Support Opportunities: | Research Grants - Young Investigators Grants |