Superconducting properties and magneto-optical imaging of Ba0.6K0.4Fe2As2 PIT wires with Ag addition

被引：42

作者：

Ding, Qing-Ping ^{[1
,2
]}

Prombood, Trirat ^{[1
]}

Tsuchiya, Yuji ^{[1
]}

Nakajima, Yasuyuki ^{[1
,2
]}

Tamegai, Tsuyoshi ^{[1
,2
]}

机构：

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

[2] Transformat Res Project Iron Pnictides TRIP, JST, Bunkyo Ku, Tokyo 1138656, Japan

来源：

SUPERCONDUCTOR SCIENCE & TECHNOLOGY | 2012年 / 25卷 / 03期

关键词：

Iron-based Superconductors - Silver - Superconducting wire - Barium compounds - Iron compounds;

D O I：

10.1088/0953-2048/25/3/035019

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have fabricated (Ba, K)Fe2As2 superconducting wires through an ex situ powder-in-tube method. Silver was used as a chemical addition to improve the performance of these superconducting wires. The transport critical current densities (J(c)) have reached 1.3 x 10(4) A cm(-2) and 1.0 x 10(4) A cm(-2) at 4.2 K under self-field in the wires with and without Ag addition. We used a magneto-optical (MO) imaging technique to investigate the properties of grain boundaries in the (Ba, K)Fe2As2 superconducting wire with Ag addition. MO images show the weak links in the Fe-based superconducting wires for the first time. An intragranular J(c) of 6.0 x 10(4) A cm(-2) at 20 K is obtained from the MO image, which is consistent with the estimation from M-H measurement.

引用

页数：5

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