Textured Sr1-xKxFe2As2 superconducting tapes with high critical current density
Textured Sr1-xKxFe2As2 superconducting tapes with high critical current density
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DOI：
10.1016/j.physc.2011.09.003
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发表时间：
2011-12-01
影响因子：
1.7
通讯作者：
Ma, Yanwei
中科院分区：
文献类型：
--
作者：
Wang, Lei;Qi, Yanpeng;Ma, Yanwei
降低多晶铁磷属化物临界电流密度的一个关键问题是固有的弱连接行为。使用完善的，工业可扩展的，变形过程中，我们已经实现了粉末管Sr0.6K0.4Fe2As2磁带中的c轴对齐的晶粒。随后进行短暂的高温退火以增强连接性。在4.2K自场下，Sr_（1-x）K_xFe_2As_2超导带材的输运临界电流密度超过5000 A/cm（2）。这为制造能够承载高电流的铁基超导带材提供了可能性。(C)2011 Elsevier B. V.保留所有权利。
A critical issue in depressing critical current density in polycrystalline iron pnictides is intrinsic weak-link behavior. Using well established, industrial scalable, deformation processes, we have achieved c-axis aligned grains in powder-in-tube Sr0.6K0.4Fe2As2 tapes. This is followed by a short high-temperature annealing to enhance the connectivity. The resultant Sr1-xKxFe2As2 superconducting tapes have transport critical current densities exceeding 5000 A/cm(2) at 4.2 K in self field. This advance open tip possibilities for fabricating iron-based superconducting tapes capable of carrying high currents. (C) 2011 Elsevier B.V. All rights reserved.