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Abstract:

Addition of nonsuperconducting phases, such as carbon nanotubes, can modify the superconducting properties of MgB 2 samples, improving the critical current density and upper critical field. A full understanding of the flux creep mechanism involved is crucial to the development of superconducting magnets in persistent mode, one of the main thrusts for the development of MgB 2 wires. In this paper we present a creep study in bulk MgB 2 samples, pure and with different amounts of carbon nanotubes additions. We conclude that the most consistent picture at low temperatures is a single vortex pinning regime, where the correlation length is limited by the grain size. We introduce a novel analysis that allows us to identify the region where the Anderson-Kim model is valid. © 2013 AIP Publishing LLC.

Registro:

Documento: Artículo
Título:Carbon nanotubes effects on the relaxation properties and critical current densities of MgB 2 superconductor
Autor:Pasquini, G.; Serquis, A.; Moreno, A.J.; Serrano, G.; Civale, L.
Filiación:Departamento de Física, FCEN, Universidad de Buenos Aires, Conicet, Argentina
Instituo Balseiro-Centro Atómico Bariloche, Conicet, S. C. de Bariloche 8400, Río Negro, Argentina
Los Alamos National Laboratory, MS K764, Los Alamos, NM 87545, United States
Palabras clave:Correlation lengths; Flux creep mechanism; Low temperatures; Persistent mode; Relaxation property; Single vortices; Superconducting properties; Upper critical fields; Creep; Superconducting magnets; Superconducting wire; Superconductivity; Carbon nanotubes
Año:2013
Volumen:114
Número:2
DOI: http://dx.doi.org/10.1063/1.4813132
Título revista:Journal of Applied Physics
Título revista abreviado:J Appl Phys
ISSN:00218979
CODEN:JAPIA
PDF:https://bibliotecadigital.exactas.uba.ar/download/paper/paper_00218979_v114_n2_p_Pasquini.pdf
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00218979_v114_n2_p_Pasquini

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Citas:

---------- APA ----------
Pasquini, G., Serquis, A., Moreno, A.J., Serrano, G. & Civale, L. (2013) . Carbon nanotubes effects on the relaxation properties and critical current densities of MgB 2 superconductor. Journal of Applied Physics, 114(2).
http://dx.doi.org/10.1063/1.4813132
---------- CHICAGO ----------
Pasquini, G., Serquis, A., Moreno, A.J., Serrano, G., Civale, L. "Carbon nanotubes effects on the relaxation properties and critical current densities of MgB 2 superconductor" . Journal of Applied Physics 114, no. 2 (2013).
http://dx.doi.org/10.1063/1.4813132
---------- MLA ----------
Pasquini, G., Serquis, A., Moreno, A.J., Serrano, G., Civale, L. "Carbon nanotubes effects on the relaxation properties and critical current densities of MgB 2 superconductor" . Journal of Applied Physics, vol. 114, no. 2, 2013.
http://dx.doi.org/10.1063/1.4813132
---------- VANCOUVER ----------
Pasquini, G., Serquis, A., Moreno, A.J., Serrano, G., Civale, L. Carbon nanotubes effects on the relaxation properties and critical current densities of MgB 2 superconductor. J Appl Phys. 2013;114(2).
http://dx.doi.org/10.1063/1.4813132