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首页> 外文期刊>Superconductor Science & Technology >Fabrication of iron-based superconducting tapes using Ba1-xKxFe2As2 with x=0.3 and 0.4
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Fabrication of iron-based superconducting tapes using Ba1-xKxFe2As2 with x=0.3 and 0.4

机译：使用Ba1-XKXFE2AS2制造铁基超导带，X = 0.3和0.4

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摘要

We fabricated iron-based superconducting tapes by using Ba1-xKxFe2As2 with different potassium concentrations (x = 0.3 and 0.4) and the powder-in-tube method, and we studied their superconducting properties. The temperature (T) dependence of magnetization of the x = 0.3 tape showed a sharper superconducting transition compared with the x = 0.4 tape. Moreover, the x. =. 0.3 tape showed a high value of transport J(c) exceeding 10(5) A cm(-2) at T = 4.2 K and self-field, demonstrating the high potential of the x. =. 0.3 tape. On the other hand, the x. =. 0.4 tape showed larger J(c) values in higher fields (mu H-0. > 0.5 T) reaching 5.0. x. 10(4) A cm(-2) at mu H-0. =. 3 T, which is attributed to improved grain connectivity. In the scanning electron microscope images, we observed cracks and voids in the superconducting cores, which are likely to limit their performance. Further enhancement of Jc is expected by improving the grain connectivity of the superconducting cores through the optimization of the fabrication and heat treatment processes, especially for the x = 0.3 tape.
机译：我们通过使用不同的钾浓度（x = 0.3和0.4）和粉末管方法来制造铁基超导磁带，并研究了它们的超导性能。与X = 0.4带相比，X = 0.3磁带的磁化的温度（t）依赖性显示出更尖锐的超导转变。而且，x。 =。 0.3胶带在T = 4.2 k和自场显示出超过10（5）厘米（-2）的高值j（c），展示X的高电位。 =。 0.3胶带。另一方面，x。 =。 0.4磁带在较高场（MU H-0）中显示出较大的j（c）值（mu h-0.> 0.5 t）达到5.0。 X。 10（4）mu H-0的cm（-2）。 =。 3 T，归因于改善的晶粒连通性。在扫描电子显微镜图像中，我们观察了超导核中的裂缝和空隙，这可能会限制它们的性能。通过优化制造和热处理方法改善超导芯的晶粒连接，特别是对于X = 0.3胶带来进一步提高JC的进一步增强。

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