TY - JOUR
T1 - Promising critical current density characteristics of Ag-sheathed (Sr,Na)Fe2As2 tape
AU - Suwa, Takahiro
AU - Pyon, Sunseng
AU - Tamegai, Tsuyoshi
AU - Awaji, Satoshi
N1 - Funding Information:
Acknowledgments This work was partially supported by a Grant-in-Aid for Young Scientists (B) (16K17745), a Grant-in-Aid for Scientific Research (A) (17H01141), and the Japan–China Bilateral Joint Research Project of the Japan Society for the Promotion of Science. Some of this work was performed at the High Field Laboratory for Superconducting Materials, Institute for Materials Research, Tohoku University (Project No. 16H0045).
Publisher Copyright:
© 2018 The Japan Society of Applied Physics.
PY - 2018/6
Y1 - 2018/6
N2 - We report the fabrication of (Sr,Na)Fe2As2 superconducting tapes by the powder-in-tube technique and their characteristics, including the transport critical current density Jc at 4.2 K up to 140 kOe, the magnetic Jc estimated from magnetic hysteresis curves, magneto-optical (MO) images, and scanning electron microscopy images. In a tape sintered at 875 °C for 1 h, the transport Jc reaches 26 kA/cm2 at 4.2K and 100 kOe for a field perpendicular to the tape surface. When the field is parallel to the tape surface, the magnetic Jc exceeds the practical level of 100 kA/cm2 at 4.2K below 25 kOe. Analysis of the MO images reveals clear current discontinuity lines in the core, indicating that the current flows homogeneously and the connections between grains are strong in the core.
AB - We report the fabrication of (Sr,Na)Fe2As2 superconducting tapes by the powder-in-tube technique and their characteristics, including the transport critical current density Jc at 4.2 K up to 140 kOe, the magnetic Jc estimated from magnetic hysteresis curves, magneto-optical (MO) images, and scanning electron microscopy images. In a tape sintered at 875 °C for 1 h, the transport Jc reaches 26 kA/cm2 at 4.2K and 100 kOe for a field perpendicular to the tape surface. When the field is parallel to the tape surface, the magnetic Jc exceeds the practical level of 100 kA/cm2 at 4.2K below 25 kOe. Analysis of the MO images reveals clear current discontinuity lines in the core, indicating that the current flows homogeneously and the connections between grains are strong in the core.
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U2 - 10.7567/APEX.11.063101
DO - 10.7567/APEX.11.063101
M3 - Article
AN - SCOPUS:85047925396
SN - 1882-0778
VL - 11
JO - Applied Physics Express
JF - Applied Physics Express
IS - 6
M1 - 063101
ER -