Fabrication and transport properties of Sr0.6K0.4Fe2As2 multifilamentary superconducting wires

Fabrication and transport properties of Sr0.6K0.4Fe2As2 multifilamentary superconducting wires
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Sr0.6K0.4Fe2As2复丝超导线材的制备及输运性能

DOI:
10.1063/1.4794059
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发表时间:
2012-12
影响因子:
4
通讯作者:
Zhang, Qianjun
Zhang, Qianjun
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Wang, Dongliang;Wang, Chunlei;Lin, He;Zhang, Qianjun

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采用异位管内粉法制备了七芯银/铁护套Sr0.6K0.4Fe2As2 (Sr-122)超导线材。系统研究了线材的冷加工变形过程与超导性能之间的关系。研究发现,平轧可以有效提高超导芯材的质量密度,从而显着提高拉制线材的输运临界电流密度(Jc)。最佳样品的输运 Jc 在自场 4.2 K 下达到 21.1 kA/cm2,并且在高场下表现出非常弱的磁场依赖性。我们的结果表明多丝铁基超导体在实际应用中具有广阔的前景。
Seven-core Ag/Fe sheathed Sr0.6K0.4Fe2As2 (Sr-122) superconducting wires were produced by the ex situ powder-in-tube method. The relationship between the cold-work deformation process and the superconducting properties of the wires was systematically studied. It was found that flat rolling can efficiently increase the mass density of the superconducting core, thus, significantly improving the transport critical current density (Jc) of the as-drawn wires. The transport Jc of the best sample achieved 21.1 kA/cm2 at 4.2 K in self field, and showed very weak magnetic field dependence at high fields. Our result suggested a promising future of multifilamentary iron-based superconductors in practical applications.
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