A precursor mechanism triggering the second magnetization peak phenomenon in superconducting materials

Abstract The correlation in type-II superconductors between the creep rate S and the Second Magnetization Peak (SMP) phenomenon which produces an increase in Jc, as a function of the field (H), has been investigated at different temperatures by starting from the minimum in S(H) and the onset of the...

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Autores principales:	M. Polichetti, A. Galluzzi, K. Buchkov, V. Tomov, E. Nazarova, A. Leo, G. Grimaldi, S. Pace
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/03fd478f241c4cd8b89c6c2bcd1b5764
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spelling	oai:doaj.org-article:03fd478f241c4cd8b89c6c2bcd1b57642021-12-02T13:27:09ZA precursor mechanism triggering the second magnetization peak phenomenon in superconducting materials10.1038/s41598-021-86728-82045-2322https://doaj.org/article/03fd478f241c4cd8b89c6c2bcd1b57642021-03-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-86728-8https://doaj.org/toc/2045-2322Abstract The correlation in type-II superconductors between the creep rate S and the Second Magnetization Peak (SMP) phenomenon which produces an increase in Jc, as a function of the field (H), has been investigated at different temperatures by starting from the minimum in S(H) and the onset of the SMP phenomenon detected on a FeSe0.5Te0.5 sample. Then the analysis has been extended by considering the entire S(H) curves and comparing our results with those of many other superconducting materials reported in literature. In this way, we find evidence that the flux dynamic mechanisms behind the appearance of the SMP phenomenon in Jc(H) are activated at fields well below those where the critical current starts effectively to increase. Moreover, the found universal relation between the minimum in the S(H) and the SMP phenomenon in Jc(H) shows that both can be attributed to a sequential crossover between a less effective pinning (losing its effectiveness at low fields) to a more effective pinning (still acting at high fields), regardless of the type-II superconductor taken into consideration.M. PolichettiA. GalluzziK. BuchkovV. TomovE. NazarovaA. LeoG. GrimaldiS. PaceNature 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 M. Polichetti A. Galluzzi K. Buchkov V. Tomov E. Nazarova A. Leo G. Grimaldi S. Pace A precursor mechanism triggering the second magnetization peak phenomenon in superconducting materials
description	Abstract The correlation in type-II superconductors between the creep rate S and the Second Magnetization Peak (SMP) phenomenon which produces an increase in Jc, as a function of the field (H), has been investigated at different temperatures by starting from the minimum in S(H) and the onset of the SMP phenomenon detected on a FeSe0.5Te0.5 sample. Then the analysis has been extended by considering the entire S(H) curves and comparing our results with those of many other superconducting materials reported in literature. In this way, we find evidence that the flux dynamic mechanisms behind the appearance of the SMP phenomenon in Jc(H) are activated at fields well below those where the critical current starts effectively to increase. Moreover, the found universal relation between the minimum in the S(H) and the SMP phenomenon in Jc(H) shows that both can be attributed to a sequential crossover between a less effective pinning (losing its effectiveness at low fields) to a more effective pinning (still acting at high fields), regardless of the type-II superconductor taken into consideration.
format	article
author	M. Polichetti A. Galluzzi K. Buchkov V. Tomov E. Nazarova A. Leo G. Grimaldi S. Pace
author_facet	M. Polichetti A. Galluzzi K. Buchkov V. Tomov E. Nazarova A. Leo G. Grimaldi S. Pace
author_sort	M. Polichetti
title	A precursor mechanism triggering the second magnetization peak phenomenon in superconducting materials
title_short	A precursor mechanism triggering the second magnetization peak phenomenon in superconducting materials
title_full	A precursor mechanism triggering the second magnetization peak phenomenon in superconducting materials
title_fullStr	A precursor mechanism triggering the second magnetization peak phenomenon in superconducting materials
title_full_unstemmed	A precursor mechanism triggering the second magnetization peak phenomenon in superconducting materials
title_sort	precursor mechanism triggering the second magnetization peak phenomenon in superconducting materials
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/03fd478f241c4cd8b89c6c2bcd1b5764
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A precursor mechanism triggering the second magnetization peak phenomenon in superconducting materials

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