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Improved Superconducting Properties of NaCl Doped MgB2
IEEE Transactions on Applied Superconductivity ( IF 1.7 ) Pub Date : 2021-06-14 , DOI: 10.1109/tasc.2021.3089114
Yu Lin , Yutong Liu , Liang Zheng , Dajin Zhou , Zhou Yu , Yongliang Chen , Xinsheng Yang , Cuihua Cheng , Yong Zhang , Yong Zhao

MgB 2 superconducting materials have important application potential in the 20K temperature region, which is a significant advantage compared with other low-temperature superconductors (such as Nb-Ti and Nb3Sn). However, there is a big gap between its superconducting current-carrying capacity and Ni-Ti and Nb 3 Sn, which is due to the weak magnetic flux pinning force and the poor connection between the MgB 2 grains. Chemical doping is a simple and effective method to improve the performance of MgB 2 . This paper studies the effect of NaCl doping on the performance of MgB 2 . It is found that NaCl doping has a positive effect on improving the interconnection of MgB 2 grains and refining MgB 2 grains, and is a potentially effective method to improve the superconducting properties of MgB 2 . In addition, all of the samples in this study showed surface pinning characteristics, but the smaller the MgB 2 grain size, the better the match with the surface pinning characteristics described by Kramer's theory.

中文翻译:


改善 NaCl 掺杂 MgB2 的超导性能



MgB 2超导材料在20K温度区具有重要的应用潜力,与其他低温超导体(如Nb-Ti和Nb3Sn)相比具有显着的优势。但其超导载流能力与Ni-Ti、Nb 3 Sn有较大差距,这是由于磁通钉扎力较弱以及MgB 2晶粒之间的连接不良造成的。化学掺杂是提高MgB 2性能的一种简单有效的方法。本文研究了NaCl掺杂对MgB 2性能的影响。研究发现,NaCl掺杂对改善MgB 2晶粒互连、细化MgB 2晶粒具有积极作用,是提高MgB 2超导性能的潜在有效方法。此外,本研究中的所有样品均表现出表面钉扎特性,但MgB 2晶粒尺寸越小,与Kramer理论描述的表面钉扎特性越匹配。
更新日期:2021-06-14
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