The morphologic correlation between vortex transformation and upper critical field line in opal-based nanocomposites

Abstract In this study, we investigate metallic nanocomposites to elucidate the properties of nanostructured conventional superconductors. Liquid tin, indium, and mercury are loaded into opal matrices by high pressure up to 10 kbar. The opal templates preserve the 3D dendritic morphology of confined...

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Autores principales:	M. K. Lee, E. V. Charnaya, S. Mühlbauer, U. Jeng, L. J. Chang, Yu. A. Kumzerov
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/8c6e884c21d34d38b37992422f3ccbae
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spelling	oai:doaj.org-article:8c6e884c21d34d38b37992422f3ccbae2021-12-02T13:19:22ZThe morphologic correlation between vortex transformation and upper critical field line in opal-based nanocomposites10.1038/s41598-021-84343-12045-2322https://doaj.org/article/8c6e884c21d34d38b37992422f3ccbae2021-02-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-84343-1https://doaj.org/toc/2045-2322Abstract In this study, we investigate metallic nanocomposites to elucidate the properties of nanostructured conventional superconductors. Liquid tin, indium, and mercury are loaded into opal matrices by high pressure up to 10 kbar. The opal templates preserve the 3D dendritic morphology of confined superconducting metals to model a dendritic second phase with particular grain shape in bulk superconductors observed by a DualBeam microscope. We carry out measurements of the dc and ac magnetizations to study the superconducting phase diagrams, vortex dynamics, and impact of grain morphology in the opal composites. Besides, we apply the small-angle neutron scattering (SANS) to deny a regular vortex structure. The phase diagrams reveal an enhanced upper critical field H c2(0) and curvature crossover in the upper critical field line. We also calculate the vortex activation barriers U a and observe a transformation in the vortex system. According to the field dependence of U a , the vortex structure transformation highly correlates with the curvature crossover in the upper critical field line. Our observations suggest that the similarity in the normalized phase diagrams and field dependences of U a in the three nanocomposites is owing to their particular morphology of confinement.M. K. LeeE. V. CharnayaS. MühlbauerU. JengL. J. ChangYu. A. KumzerovNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-11 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q M. K. Lee E. V. Charnaya S. Mühlbauer U. Jeng L. J. Chang Yu. A. Kumzerov The morphologic correlation between vortex transformation and upper critical field line in opal-based nanocomposites
description	Abstract In this study, we investigate metallic nanocomposites to elucidate the properties of nanostructured conventional superconductors. Liquid tin, indium, and mercury are loaded into opal matrices by high pressure up to 10 kbar. The opal templates preserve the 3D dendritic morphology of confined superconducting metals to model a dendritic second phase with particular grain shape in bulk superconductors observed by a DualBeam microscope. We carry out measurements of the dc and ac magnetizations to study the superconducting phase diagrams, vortex dynamics, and impact of grain morphology in the opal composites. Besides, we apply the small-angle neutron scattering (SANS) to deny a regular vortex structure. The phase diagrams reveal an enhanced upper critical field H c2(0) and curvature crossover in the upper critical field line. We also calculate the vortex activation barriers U a and observe a transformation in the vortex system. According to the field dependence of U a , the vortex structure transformation highly correlates with the curvature crossover in the upper critical field line. Our observations suggest that the similarity in the normalized phase diagrams and field dependences of U a in the three nanocomposites is owing to their particular morphology of confinement.
format	article
author	M. K. Lee E. V. Charnaya S. Mühlbauer U. Jeng L. J. Chang Yu. A. Kumzerov
author_facet	M. K. Lee E. V. Charnaya S. Mühlbauer U. Jeng L. J. Chang Yu. A. Kumzerov
author_sort	M. K. Lee
title	The morphologic correlation between vortex transformation and upper critical field line in opal-based nanocomposites
title_short	The morphologic correlation between vortex transformation and upper critical field line in opal-based nanocomposites
title_full	The morphologic correlation between vortex transformation and upper critical field line in opal-based nanocomposites
title_fullStr	The morphologic correlation between vortex transformation and upper critical field line in opal-based nanocomposites
title_full_unstemmed	The morphologic correlation between vortex transformation and upper critical field line in opal-based nanocomposites
title_sort	morphologic correlation between vortex transformation and upper critical field line in opal-based nanocomposites
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/8c6e884c21d34d38b37992422f3ccbae
work_keys_str_mv	AT mklee themorphologiccorrelationbetweenvortextransformationanduppercriticalfieldlineinopalbasednanocomposites AT evcharnaya themorphologiccorrelationbetweenvortextransformationanduppercriticalfieldlineinopalbasednanocomposites AT smuhlbauer themorphologiccorrelationbetweenvortextransformationanduppercriticalfieldlineinopalbasednanocomposites AT ujeng themorphologiccorrelationbetweenvortextransformationanduppercriticalfieldlineinopalbasednanocomposites AT ljchang themorphologiccorrelationbetweenvortextransformationanduppercriticalfieldlineinopalbasednanocomposites AT yuakumzerov themorphologiccorrelationbetweenvortextransformationanduppercriticalfieldlineinopalbasednanocomposites AT mklee morphologiccorrelationbetweenvortextransformationanduppercriticalfieldlineinopalbasednanocomposites AT evcharnaya morphologiccorrelationbetweenvortextransformationanduppercriticalfieldlineinopalbasednanocomposites AT smuhlbauer morphologiccorrelationbetweenvortextransformationanduppercriticalfieldlineinopalbasednanocomposites AT ujeng morphologiccorrelationbetweenvortextransformationanduppercriticalfieldlineinopalbasednanocomposites AT ljchang morphologiccorrelationbetweenvortextransformationanduppercriticalfieldlineinopalbasednanocomposites AT yuakumzerov morphologiccorrelationbetweenvortextransformationanduppercriticalfieldlineinopalbasednanocomposites
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The morphologic correlation between vortex transformation and upper critical field line in opal-based nanocomposites

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