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Developments of (Ba,Na)Fe 2 As 2 and CaKFe 4 As 4 HIP round wires
Superconductor Science and Technology ( IF 3.7 ) Pub Date : 2020-08-18 , DOI: 10.1088/1361-6668/abaa38
T Tamegai 1 , S Pyon 1 , D Miyawaki 1 , Y Kobayashi 1 , S Awaji 2 , H Kito 3 , S Ishida 3 , Y Yoshida 3 , K Takano 4 , H Kajitani 4 , N Koizumi 4
Affiliation  

With excellent superconducting properties such as high T c , large H c2 , small anisotropy, and large J c , developments of superconducting wires and tapes of iron-based superconductors (IBSs) have been undertaken with promising results. So far, K-doped 122-type IBSs have been mainly developed for such purposes. Here, efforts to fabricate Na-doped 122-type IBS, (Ba,Na)Fe 2 As 2 , are presented. With the help of hot isostatic pressing (HIP) process, excellent J c characteristics of up to 44 kA cm −2 at 4.2 K under 100 kOe have been achieved. Detailed characterizations of (Ba,Na)Fe 2 As 2 HIP round wire are presented. On the other hand, discoveries of new IBSs continue, with CaKFe 4 As 4 as one of recent examples. CaKFe 4 As 4 belongs to a new family of IBSs with 1144 structure, where Ca and K occupy the Ba site in BaFe 2

中文翻译:

(Ba,Na)Fe 2 As 2和CaKFe 4 As 4 HIP圆线的发展

具有优良的超导性能,例如高T c,大H c2,各向异性小和大J c,铁基超导体(IBSs)的超导线和带的开发已经取得了可喜的结果。到目前为止,主要是为了这种目的而开发出掺K的122型IBS。在此,提出了制造Na掺杂的122型IBS((Ba,Na)Fe 2 As 2)的努力。借助于热等静压(HIP)工艺,在100 kOe下于4.2 K下获得了高达44 kA cm -2的出色J c特性。介绍了(Ba,Na)Fe 2 As 2 HIP圆线的详细特性。另一方面,新的IBS的发现仍在继续,CaKFe 4 As 4是最近的例子之一。CaKFe 4 As 4属于具有1144结构的IBS新家族,其中Ca和K占据BaFe 2中的Ba位点
更新日期:2020-08-19
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