Analysis of the E-J Curve of HTS Tapes Under DC and AC Magnetic Fields at 77 K

dc.contributor.authorShigue, Carlos Yujiro
dc.contributor.authorda Cruz, Tatiane Tobias
dc.contributor.authorLamas, Jerika Suely
dc.contributor.authorBaldan, Carlos Alberto [UNESP]
dc.contributor.authorRuppert Filho, Ernesto
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade Estadual de Campinas (UNICAMP)
dc.date.accessioned2014-05-20T13:27:26Z
dc.date.available2014-05-20T13:27:26Z
dc.date.issued2009-06-01
dc.description.abstractThe evaluation of the electrical characteristics of technical HTS tapes are of the key importance in determining the design and operational features of superconducting power apparatuses as well as to understand the external factors which affect the superconducting performance. In this work we report the systematic measurements of the electric field versus current density, E-J relation of short samples for three commercial HTS tapes (BSCCO-2223 tapes, with and without steel reinforcement, and YBCO-coated conductor) at 77 K. In order to get sensitive and noiseless voltage signals the measurements were carried out with DC transport current and subjecting the broad surface tape to DC (0-300 mT) and AC (0-62 mT, 60 Hz) magnetic fields. The voltage is measured by a sensitive nanovoltmeter and the applied magnetic field is monitored by a Hall sensor placed on the tape broad surface. The comparison between the results obtained from the three tapes was done by fitting a power-law equation for currents in the vicinity of the critical current. For the current regime below the critical one a linear correlation of the electric field against the current density is observed. The BSCCO samples presented the same behavior, i.e., a decreasing of n-index with the increasing DC and AC magnetic field strength. Under AC field the decreasing slope of n-index is steeper as compared to DC field. The n-index curve for the YBCO tape showed similar behavior for AC field, however under DC field in the 0-390 mT range exhibited a slight decreasing of the n-index.en
dc.description.affiliationUniv São Paulo, Escola Engn Lorena, Lorena, SP, Brazil
dc.description.affiliationUNESP, Univ Estadual Paulista, Dept Engn Eletr, Guaratingueta, SP, Brazil
dc.description.affiliationUniv Estadual Campinas, Univ Estadual Campinas, Fac Engn Eletr & Computacao, Campinas, SP, Brazil
dc.description.affiliationUnespUNESP, Univ Estadual Paulista, Dept Engn Eletr, Guaratingueta, SP, Brazil
dc.description.sponsorshipCPFL
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.format.extent3332-3335
dc.identifierhttp://dx.doi.org/10.1109/TASC.2009.2018309
dc.identifier.citationIEEE Transactions on Applied Superconductivity. Piscataway: IEEE-Inst Electrical Electronics Engineers Inc, v. 19, n. 3, p. 3332-3335, 2009.
dc.identifier.doi10.1109/TASC.2009.2018309
dc.identifier.issn1051-8223
dc.identifier.lattes1689995854269032
dc.identifier.urihttp://hdl.handle.net/11449/9016
dc.identifier.wosWOS:000268282200191
dc.language.isoeng
dc.publisherInstitute of Electrical and Electronics Engineers (IEEE)
dc.relation.ispartofIEEE Transactions on Applied Superconductivity
dc.relation.ispartofjcr1.288
dc.relation.ispartofsjr0,408
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectAC lossesen
dc.subjectcritical currenten
dc.subjectHTS tapesen
dc.subjectpower-law relationen
dc.titleAnalysis of the E-J Curve of HTS Tapes Under DC and AC Magnetic Fields at 77 Ken
dc.typeArtigo
dcterms.licensehttp://www.ieee.org/publications_standards/publications/rights/rights_policies.html
dcterms.rightsHolderIEEE-Inst Electrical Electronics Engineers Inc
unesp.author.lattes1689995854269032
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Engenharia, Guaratinguetápt

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