Progress in the development of the 122-type IBS wires
Xianping Zhang, Yanwei Ma
Abstract
Profit from their low anisotropy and high upper critical field, iron-based superconductors (IBSs) have great potential for high magnetic fields applications. Significant progress has been made for the current density improvement of (Sr,Ba)0.6K0.4Fe2As2 (122-type) IBS wires over the past fourteen years. In this article, an overview of the preparation procedures and key issues affecting the critical current performance of 122-type IBS wires is given, to provide a fundamental understanding of what controls the transport critical current density of 122-type IBS wires. Additionally, the recent developments for 122-type IBS wires are presented and future prospect and challenges in the development of 122-type IBS wires for practical applications are discussed.