Carbon nanotubes effects on the relaxation properties and critical current densities of MgB 2 superconductor

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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 mag...

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Autores principales: Pasquini, G., Serquis, A., Moreno, A.J., Serrano, G., Civale, L.
Formato: Artículo publishedVersion
Publicado: 2013
Materias:
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
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00218979_v114_n2_p_Pasquini
http://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_00218979_v114_n2_p_Pasquini_oai
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Repositorio Digital de la Universidad de Buenos Aires (UBA) de Universidad de Buenos Aires
id I28-R145-paper_00218979_v114_n2_p_Pasquini_oai
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spelling I28-R145-paper_00218979_v114_n2_p_Pasquini_oai2020-10-19 Pasquini, G. Serquis, A. Moreno, A.J. Serrano, G. Civale, L. 2013 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. Fil:Pasquini, G. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Serquis, A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Civale, L. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. application/pdf http://hdl.handle.net/20.500.12110/paper_00218979_v114_n2_p_Pasquini info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar J Appl Phys 2013;114(2) 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 Carbon nanotubes effects on the relaxation properties and critical current densities of MgB 2 superconductor info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion http://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_00218979_v114_n2_p_Pasquini_oai
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-145
collection Repositorio Digital de la Universidad de Buenos Aires (UBA)
topic 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
spellingShingle 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
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
topic_facet 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
description 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.
format Artículo
Artículo
publishedVersion
author Pasquini, G.
Serquis, A.
Moreno, A.J.
Serrano, G.
Civale, L.
author_facet Pasquini, G.
Serquis, A.
Moreno, A.J.
Serrano, G.
Civale, L.
author_sort Pasquini, G.
title Carbon nanotubes effects on the relaxation properties and critical current densities of MgB 2 superconductor
title_short Carbon nanotubes effects on the relaxation properties and critical current densities of MgB 2 superconductor
title_full Carbon nanotubes effects on the relaxation properties and critical current densities of MgB 2 superconductor
title_fullStr Carbon nanotubes effects on the relaxation properties and critical current densities of MgB 2 superconductor
title_full_unstemmed Carbon nanotubes effects on the relaxation properties and critical current densities of MgB 2 superconductor
title_sort carbon nanotubes effects on the relaxation properties and critical current densities of mgb 2 superconductor
publishDate 2013
url http://hdl.handle.net/20.500.12110/paper_00218979_v114_n2_p_Pasquini
http://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_00218979_v114_n2_p_Pasquini_oai
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AT morenoaj carbonnanotubeseffectsontherelaxationpropertiesandcriticalcurrentdensitiesofmgb2superconductor
AT serranog carbonnanotubeseffectsontherelaxationpropertiesandcriticalcurrentdensitiesofmgb2superconductor
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