{"title":"Experimental Validation of a Scaling Law for the Critical Current of Commercial REBCO Tapes as a Function of Magnetic Field and Temperature","authors":"G. Succi;A. Ballarino;S. C. Hopkins;Y. Yang","doi":"10.1109/TASC.2025.3543797","DOIUrl":null,"url":null,"abstract":"Much information is lacking at present on the electrical properties of commercial REBCO tapes. This work, which builds on a previous paper of the same authors, presents the results of an experimental campaign aimed at deriving the critical current of tapes from SuperPower, Fujikura, Faraday Factory, and Shanghai Superconductor Technology. The campaign was conducted by applying both the transport method at 4.2 K, in perpendicular background magnetic fields of up to 15 T, and the magnetization method from 4.2 K up to the critical temperature in fields of up to 10 T. This latter method was adopted to determining the so-called crossover field, <inline-formula><tex-math>${{B}_0}$</tex-math></inline-formula>, at which the transition from single vortex pinning to collective pinning takes place. <inline-formula><tex-math>${{B}_0}$</tex-math></inline-formula> is challenging to determine by the transport method because of the high currents involved (at 4.2 K, <inline-formula><tex-math>${{B}_0}$</tex-math></inline-formula> is roughly 1 T, which corresponds to currents above 1500 A, for a 4 mm tape). Magnetization measurements corroborate transport measurements at 4.2 K both below <inline-formula><tex-math>${{B}_0}$</tex-math></inline-formula> and up to 10 T. Further magnetization measurements above 4.2 K allow the temperature dependence of the scaling parameters to be derived, for correlation with the methodology of flux pinning enhancement by different manufacturers. This provides insights about the effectiveness and interplay of pinning mechanisms.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"35 5","pages":"1-9"},"PeriodicalIF":1.7000,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"IEEE Transactions on Applied Superconductivity","FirstCategoryId":"101","ListUrlMain":"https://ieeexplore.ieee.org/document/10908459/","RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}
引用次数: 0
Abstract
Much information is lacking at present on the electrical properties of commercial REBCO tapes. This work, which builds on a previous paper of the same authors, presents the results of an experimental campaign aimed at deriving the critical current of tapes from SuperPower, Fujikura, Faraday Factory, and Shanghai Superconductor Technology. The campaign was conducted by applying both the transport method at 4.2 K, in perpendicular background magnetic fields of up to 15 T, and the magnetization method from 4.2 K up to the critical temperature in fields of up to 10 T. This latter method was adopted to determining the so-called crossover field, ${{B}_0}$, at which the transition from single vortex pinning to collective pinning takes place. ${{B}_0}$ is challenging to determine by the transport method because of the high currents involved (at 4.2 K, ${{B}_0}$ is roughly 1 T, which corresponds to currents above 1500 A, for a 4 mm tape). Magnetization measurements corroborate transport measurements at 4.2 K both below ${{B}_0}$ and up to 10 T. Further magnetization measurements above 4.2 K allow the temperature dependence of the scaling parameters to be derived, for correlation with the methodology of flux pinning enhancement by different manufacturers. This provides insights about the effectiveness and interplay of pinning mechanisms.
期刊介绍:
IEEE Transactions on Applied Superconductivity (TAS) contains articles on the applications of superconductivity and other relevant technology. Electronic applications include analog and digital circuits employing thin films and active devices such as Josephson junctions. Large scale applications include magnets for power applications such as motors and generators, for magnetic resonance, for accelerators, and cable applications such as power transmission.