@article{oai:repo.qst.go.jp:00077722,
 author = {tsuyoshi, tamegai and takahiro, suwa and daisuke, miyawaki and sunseng, pyon and Takano, Katsutoshi and Kajitani, Hideki and Koizumi, Norikiyo and satoshi, awaji and Katsutoshi, Takano and Hideki, Kajitani and Norikiyo, Koizumi},
 issue = {5},
 journal = {IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY},
 month = {Aug},
 note = {Na-substituted 122-type iron-based superconductors were synthesized and fabricated into superconducting tapes and wires. Good J(c) performance of Ag-sheathed Sr0.45Na0.55Fe2As2 pressed tapes was demonstrated, and it was further improved by using AgSn as a sheath material. The improved J(c) characteristics are due to the reduction of the optimum sintering temperature by similar to 100 degrees C, which suppressed the reaction between the sheath and the core. However, the fabrication of good Sr(0.4)5Na(0.55)Fe(2)As(2) round wire using the hot isostatic press method failed, due possibly to the segregation of Na in the core. To avoid the segregation of Na, we fabricated round wires employing (Ba,Na)Fe2As2 rather than underdoped (Sr,Na)Fe2As2. J(c) in Ba0.6Na0.4Fe2As2 round wire processed 700 degrees C under the pressure of 175 MPa reached 1.5 x 10(5) and 2.0 x 10(4) A/cm(2) at self-field and 100 kOe, respectively. These values are more than fifty percent of the largest J(c) in (Ba,K)Fe2As2 round wires, demonstrating the excellent performance of (Ba,Na)Fe2As2 wires.},
 title = {Demonstration of Excellent J(c) Performance in (AE,Na)Fe2As2 (AE: Sr, Ba) PIT Wires},
 volume = {29},
 year = {2019}
}