Large and field-insensitive critical current densities in (Sr,Na)Fe2As2 superconducting tapes

T. Suwa, S. Pyon, A. Park, T. Tamegai, Y. Tsuchiya, S. Awaji, K. Watanabe

Research output: Contribution to journalConference articlepeer-review

5 Citations (Scopus)


We have fabricated (Sr,Na)Fe2As2 tapes by optimizing the sintering temperature and time, and characterized their transport Jc at 4.2 K up to 14 T. The transport Jc for the (Sr,Na)Fe2As2 tape sintered at 875°C reaches 4.9 × 104 A/cm2 under self-field, and it is suppressed only down to 1.9 × 104 A/cm2 even at 14 T. We succeeded in fabricating very field-insensitive tapes, which are very promising for practical applications. We also report compositional distributions and magneto-optical images of current distribution in tapes. Magneto-optical imaging of the core of the tape clarified inhomogeneous intergranular current distributions.

Original languageEnglish
Article number012062
JournalJournal of Physics: Conference Series
Issue number1
Publication statusPublished - 2017 Jul 26
Event29th International Symposium on Superconductivity, ISS 2016 - Tokyo, Japan
Duration: 2016 Dec 132016 Dec 15

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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