On the pinning force in high density MgB2 samples

Abstract An analysis of the field dependence of the pinning force in different, high density sintered samples of MgB2 is presented. The samples were chosen to be representative for pure MgB2, MgB2 with additives, and partially oriented massive samples. In some cases, the curves of pinning force vers...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	V. Sandu, A. M. Ionescu, G. Aldica, M. A. Grigoroscuta, M. Burdusel, P. Badica
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/4c16b0c24263460e931366bb4f12e568
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:4c16b0c24263460e931366bb4f12e568
record_format	dspace
spelling	oai:doaj.org-article:4c16b0c24263460e931366bb4f12e5682021-12-02T16:31:17ZOn the pinning force in high density MgB2 samples10.1038/s41598-021-85209-22045-2322https://doaj.org/article/4c16b0c24263460e931366bb4f12e5682021-03-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-85209-2https://doaj.org/toc/2045-2322Abstract An analysis of the field dependence of the pinning force in different, high density sintered samples of MgB2 is presented. The samples were chosen to be representative for pure MgB2, MgB2 with additives, and partially oriented massive samples. In some cases, the curves of pinning force versus magnetic field of the selected samples present peculiar profiles and application of the typical scaling procedures fails. Based on the percolation model, we show that most features of the field dependence of the critical force that generate dissipation comply with the Dew-Hughes scaling law predictions within the grain boundary pinning mechanism if a connecting factor related to the superconducting connection of the grains is used. The field dependence of the connecting function, which is dependent on the superconducting anisotropy, is the main factor that controls the boundary between dissipative and non-dissipative current transport in high magnetic field. Experimental data indicate that the connecting function is also dependent on the particular properties (e.g., the presence of slightly non-stoichiometric phases, defects, homogeneity, and others) of each sample and it has the form of a single or double peaked function in all investigated samples.V. SanduA. M. IonescuG. AldicaM. A. GrigoroscutaM. BurduselP. BadicaNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q V. Sandu A. M. Ionescu G. Aldica M. A. Grigoroscuta M. Burdusel P. Badica On the pinning force in high density MgB2 samples
description	Abstract An analysis of the field dependence of the pinning force in different, high density sintered samples of MgB2 is presented. The samples were chosen to be representative for pure MgB2, MgB2 with additives, and partially oriented massive samples. In some cases, the curves of pinning force versus magnetic field of the selected samples present peculiar profiles and application of the typical scaling procedures fails. Based on the percolation model, we show that most features of the field dependence of the critical force that generate dissipation comply with the Dew-Hughes scaling law predictions within the grain boundary pinning mechanism if a connecting factor related to the superconducting connection of the grains is used. The field dependence of the connecting function, which is dependent on the superconducting anisotropy, is the main factor that controls the boundary between dissipative and non-dissipative current transport in high magnetic field. Experimental data indicate that the connecting function is also dependent on the particular properties (e.g., the presence of slightly non-stoichiometric phases, defects, homogeneity, and others) of each sample and it has the form of a single or double peaked function in all investigated samples.
format	article
author	V. Sandu A. M. Ionescu G. Aldica M. A. Grigoroscuta M. Burdusel P. Badica
author_facet	V. Sandu A. M. Ionescu G. Aldica M. A. Grigoroscuta M. Burdusel P. Badica
author_sort	V. Sandu
title	On the pinning force in high density MgB2 samples
title_short	On the pinning force in high density MgB2 samples
title_full	On the pinning force in high density MgB2 samples
title_fullStr	On the pinning force in high density MgB2 samples
title_full_unstemmed	On the pinning force in high density MgB2 samples
title_sort	on the pinning force in high density mgb2 samples
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/4c16b0c24263460e931366bb4f12e568
work_keys_str_mv	AT vsandu onthepinningforceinhighdensitymgb2samples AT amionescu onthepinningforceinhighdensitymgb2samples AT galdica onthepinningforceinhighdensitymgb2samples AT magrigoroscuta onthepinningforceinhighdensitymgb2samples AT mburdusel onthepinningforceinhighdensitymgb2samples AT pbadica onthepinningforceinhighdensitymgb2samples
_version_	1718383869921591296

On the pinning force in high density MgB2 samples

Ejemplares similares