High-performance Ba1-xKxFe2As2 superconducting joints for persistent current operation

Autor:	Yanchang Zhu, Dongliang Wang, Qiqi Wang, Zhan Zhang, Wenwen Guo, He Huang, Hongjun Ma, Fang Liu, Huajun Liu, Yanwei Ma
Jazyk:	angličtina
Rok vydání:	2021
Předmět:	Superconductivity (cond-mat.supr-con) Condensed Matter - Superconductivity Materials Chemistry Metals and Alloys Ceramics and Composites FOS: Physical sciences Electrical and Electronic Engineering Condensed Matter Physics
Popis:	Superconducting joints are one of the key technologies to make Ba1-xKxFe2As2 (Ba-122) superconducting wires or tapes for high-field applications. Herein, superconducting joints were fabricated by a simple cold-pressing method, and the joint resistance of the iron-based superconducting joint was estimated for the first time. The superconducting properties, microstructures, and elements distribution in the joint regions were investigated. At 4.2 K and 10 T, a transport critical current Ic of 105 A for the joint was obtained, and the critical current ratio (CCR= Ic-joint/Ic-tape) of the joint was 94.6%. On the other hand, the joint show very low joint resistance of 2.7x10^-13 ohm in self-field at 4.2 K. Among iron-based superconductors (IBS), this work is the first to successfully realize a superconducting joint with such high CCR and low joint resistance. This work shows great potential to apply Ba-122 in a range of practical applications, where superconducting joints are essential. 20 pages, 8 figures
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9e41f7ba1a91ba3b32e142aab532c666 http://arxiv.org/abs/2109.14300 Zobrazit plný text záznamu