Transport ac losses of a second-generation HTS tape with a ferromagnetic substrate and conducting stabilizer

Shuo Li, Du Xing Chen, Jin Fang

    Research output: Contribution to journalArticleResearchpeer-review

    6 Citations (Scopus)

    Abstract

    © 2015 IOP Publishing Ltd. The current-voltage curve and transport ac loss of a second-generation HTS tape with a ferromagnetic NiW substrate and brass stabilizer are measured. It is found that the ac loss is up to two orders of magnitude larger than what is expected by the power-law E(J) determined by the current-voltage curve and increases with increasing frequency. Modeling results show that the overly large ac loss is contributed by the ac loss in the HTS strip enhanced by the NiW substrate and the magnetic hysteresis loss in the substrate, and the frequency-dependent loss occurs in the brass layer covering the substrate but not in the ferromagnetic substrate itself as assumed previously. The ac loss in the brass layer is associated with transport currents but not eddy currents, and it has some features similar to ordinary eddy-current loss with significant differences.
    Original languageEnglish
    Article number125011
    JournalSuperconductor Science and Technology
    Volume28
    Issue number12
    DOIs
    Publication statusPublished - 2 Nov 2015

    Keywords

    • 2G HTS tape
    • ac loss
    • ferromagnetic substrate
    • power-law E(J) relation
    • scaling law

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