Promising critical current density characteristics of Ag-sheathed (Sr,Na)Fe2As2 tape

被引：11

作者：

Suwa, Takahiro ^{[1
]}

Pyon, Sunseng ^{[1
]}

Tamegai, Tsuyoshi ^{[1
]}

Awaji, Satoshi ^{[2
]}

机构：

[1] Univ Tokyo, Dept Appl Phys, Bunkyo Ku, Tokyo 1138656, Japan

[2] Tohoku Univ, Inst Mat Res, High Field Lab Superconducting Mat, Sendai, Miyagi 9808577, Japan

来源：

APPLIED PHYSICS EXPRESS | 2018年 / 11卷 / 06期

基金：

日本学术振兴会;

关键词：

WIRES;

D O I：

10.7567/APEX.11.063101

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

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 at J(c )4.2 K up to 140 kOe, the magnetic J(c) estimated from magnetic hysteresis curves, magneto-optical (MO) images, and scanning electron microscopy images. In a tape sintered at 875 degrees C for 1 h, the transport J(c) reaches 26 kA/cm(2) at 4.2 K and 100 kOe for a field perpendicular to the tape surface. When the field is parallel to the tape surface, the magnetic J(c) exceeds the practical level of 100 kA/cm(2) at 4.2 K below 25 kOe. Analysis of the MO images reveals dear current discontinuity lines in the core, indicating that the current flows homogeneously and the connections between grains are strong in the core. (C) 2018 The Japan Society of Applied Physics

引用

页数：5

共 36 条

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