Characteristic Length for Pinning Force Density in Nb3Sn
Электронный научный архив УРФУ
Информация об архиве | Просмотр оригинала| Поле | Значение | |
| Заглавие |
Characteristic Length for Pinning Force Density in Nb3Sn
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| Автор |
Talantsev, E. F.
Valova-Zaharevskaya, E. G. Deryagina, I. L. Popova, E. N. |
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| Тематика |
PINNING FORCE DENSITY IN SUPERCONDUCTORS
SCALING LAWS IN SUPERCONDUCTIVITY SUPERCONDUCTING CRITICAL CURRENT BINARY ALLOYS FLUX PINNING GRAIN BOUNDARIES MAGNETIC FIELDS NIOBIUM ALLOYS TIN ALLOYS APPLIED MAGNETIC FIELDS CHARACTERISTIC LENGTH GRAIN-BOUNDARIES MAIN PARAMETERS PINNING FORCE DENSITY PINNING FORCE DENSITY IN SUPERCONDUCTOR SCALING LAW IN SUPERCONDUCTIVITY SUPERCONDUCTING CRITICAL CURRENT SUPERCURRENT FLOWS THIN SURFACE LAYER SCALING LAWS |
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| Описание |
The pinning force density, (Formula presented.), is one of the main parameters that characterize the resilience of a superconductor to carrying a dissipative-free transport current in an applied magnetic field. Kramer (1973) and Dew-Hughes (1974) proposed a widely used scaling law for this quantity, where one of the parameters is the pinning force density maximum, (Formula presented.), which represents the maximal performance of a given superconductor in an applied magnetic field at a given temperature. Since the late 1970s to the present, several research groups have reported experimental data on the dependence of (Formula presented.) on the average grain size, (Formula presented.), in Nb3Sn-based conductors. (Formula presented.) datasets were analyzed and a scaling law for the dependence (Formula presented.) was proposed. Despite the fact that this scaling law is widely accepted, it has several problems; for instance, according to this law, at (Formula presented.) and (Formula presented.), Nb3Sn should lose its superconductivity, which is in striking contrast to experiments. Here, we reanalyzed the full inventory of publicly available (Formula presented.) data for Nb3Sn conductors and found that the dependence can be described by the exponential law, in which the characteristic length, (Formula presented.), varies within a remarkably narrow range of (Formula presented.) for samples fabricated using different technologies. The interpretation of this result is based on the idea that the in-field supercurrent flows within a thin surface layer (thickness of (Formula presented.)) near grain boundary surfaces (similar to London’s law, where the self-field supercurrent flows within a thin surface layer with a thickness of the London penetration depth, (Formula presented.), and the surface is a superconductor–vacuum surface). An alternative interpretation is that (Formula presented.) represents the characteristic length of the exponential decay flux pinning potential from the dominant defects in Nb3Sn superconductors, which are grain boundaries. © 2023 by the authors.
Ministry of Education and Science of the Russian Federation, Minobrnauka: 122021000032-5 The research was carried out within the state assignment of Ministry of Science and Higher Education of the Russian Federation (theme “Pressure” No. 122021000032-5). E.F.T. thanks the research funding from the Ministry of Science and Higher Education of the Russian Federation (Ural Federal University Program of Development within the Priority-2030 Program). |
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| Дата |
2024-04-05T16:30:09Z
2024-04-05T16:30:09Z 2023 |
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| Тип |
Article
Journal article (info:eu-repo/semantics/article) |info:eu-repo/semantics/publishedVersion |
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| Идентификатор |
Talantsev, E, Valova-Zaharevskaya , EG, Deryagina , IL & Popova, E 2023, 'Characteristic Length for Pinning Force Density in Nb3Sn', Materials, Том. 16, № 14, 5185. https://doi.org/10.3390/ma16145185
Talantsev, E., Valova-Zaharevskaya , E. G., Deryagina , I. L., & Popova, E. (2023). Characteristic Length for Pinning Force Density in Nb3Sn. Materials, 16(14), [5185]. https://doi.org/10.3390/ma16145185 1996-1944 Final All Open Access, Gold, Green https://www.scopus.com/inward/record.uri?eid=2-s2.0-85166185286&doi=10.3390%2fma16145185&partnerID=40&md5=eecf248569d9cab909230188ca183b67 https://www.mdpi.com/1996-1944/16/14/5185/pdf?version=1690186834 http://elar.urfu.ru/handle/10995/130674 10.3390/ma16145185 85166185286 001039700900001 |
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| Язык |
en
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| Права |
Open access (info:eu-repo/semantics/openAccess)
cc-by https://creativecommons.org/licenses/by/4.0/ |
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| Формат |
application/pdf
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| Издатель |
Multidisciplinary Digital Publishing Institute (MDPI)
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| Источник |
Materials
Materials |
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