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) 0.6 K 0.4 Fe 2 As 2 (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.
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