GLAG theory for superconducting property variations with A15 composition in Nb3Sn wires

Abstract We present a model for the variation of the upper critical field H c2 with Sn content in A15-type Nb-Sn wires, within the Ginzburg-Landau-Abrikosov-Gor’kov (GLAG) theory frame. H c2 at the vicinity of the critical temperature T c is related quantitatively to the electrical resistivity ρ, sp...

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Autores principales:	Yingxu Li, Yuanwen Gao
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/e6441b99bb7a4bc48664b5408b6ca854
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spelling	oai:doaj.org-article:e6441b99bb7a4bc48664b5408b6ca8542021-12-02T11:40:53ZGLAG theory for superconducting property variations with A15 composition in Nb3Sn wires10.1038/s41598-017-01292-42045-2322https://doaj.org/article/e6441b99bb7a4bc48664b5408b6ca8542017-04-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-01292-4https://doaj.org/toc/2045-2322Abstract We present a model for the variation of the upper critical field H c2 with Sn content in A15-type Nb-Sn wires, within the Ginzburg-Landau-Abrikosov-Gor’kov (GLAG) theory frame. H c2 at the vicinity of the critical temperature T c is related quantitatively to the electrical resistivity ρ, specific heat capacity coefficient γ and T c. H c2 versus tin content is theoretically formulated within the GLAG theory, and generally reproduces the experiment results. As Sn content gradually approaches the stoichiometry, A15-type Nb-Sn undergoes a transition from the dirty limit to clean limit, split by the phase transformation boundary. The H-T phase boundary and pinning force show different behaviors in the cubic and tetragonal phase. We dipict the dependence of the composition gradient on the superconducting properties variation in the A15 layer, as well as the curved tail at vicinity of H c2 in the Kramer plot of the Nb3Sn wire. This helps understanding of the inhomogeneous-composition inducing discrepancy between the results by the state-of-art scaling laws and experiments.Yingxu LiYuanwen GaoNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-13 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Yingxu Li Yuanwen Gao GLAG theory for superconducting property variations with A15 composition in Nb3Sn wires
description	Abstract We present a model for the variation of the upper critical field H c2 with Sn content in A15-type Nb-Sn wires, within the Ginzburg-Landau-Abrikosov-Gor’kov (GLAG) theory frame. H c2 at the vicinity of the critical temperature T c is related quantitatively to the electrical resistivity ρ, specific heat capacity coefficient γ and T c. H c2 versus tin content is theoretically formulated within the GLAG theory, and generally reproduces the experiment results. As Sn content gradually approaches the stoichiometry, A15-type Nb-Sn undergoes a transition from the dirty limit to clean limit, split by the phase transformation boundary. The H-T phase boundary and pinning force show different behaviors in the cubic and tetragonal phase. We dipict the dependence of the composition gradient on the superconducting properties variation in the A15 layer, as well as the curved tail at vicinity of H c2 in the Kramer plot of the Nb3Sn wire. This helps understanding of the inhomogeneous-composition inducing discrepancy between the results by the state-of-art scaling laws and experiments.
format	article
author	Yingxu Li Yuanwen Gao
author_facet	Yingxu Li Yuanwen Gao
author_sort	Yingxu Li
title	GLAG theory for superconducting property variations with A15 composition in Nb3Sn wires
title_short	GLAG theory for superconducting property variations with A15 composition in Nb3Sn wires
title_full	GLAG theory for superconducting property variations with A15 composition in Nb3Sn wires
title_fullStr	GLAG theory for superconducting property variations with A15 composition in Nb3Sn wires
title_full_unstemmed	GLAG theory for superconducting property variations with A15 composition in Nb3Sn wires
title_sort	glag theory for superconducting property variations with a15 composition in nb3sn wires
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/e6441b99bb7a4bc48664b5408b6ca854
work_keys_str_mv	AT yingxuli glagtheoryforsuperconductingpropertyvariationswitha15compositioninnb3snwires AT yuanwengao glagtheoryforsuperconductingpropertyvariationswitha15compositioninnb3snwires
_version_	1718395554114830336

GLAG theory for superconducting property variations with A15 composition in Nb3Sn wires

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