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.
|Journal||Journal of Physics: Conference Series|
|Publication status||Published - 2017 Jul 26|
|Event||29th International Symposium on Superconductivity, ISS 2016 - Tokyo, Japan|
Duration: 2016 Dec 13 → 2016 Dec 15
ASJC Scopus subject areas
- Physics and Astronomy(all)