Enhancement of superconducting properties in FeSe wires using a quenching technique

TL;DR

This study demonstrates that quenching techniques significantly improve the superconducting transition temperature and critical current density in FeSe wires, making them more suitable for practical applications.

Contribution

The paper introduces a quenching process that enhances superconducting properties of FeSe wires, achieving higher Tc and Jc compared to traditional cooling methods.

Findings

Zero resistivity at about 10 K in quenched wires

Transport Jc three times higher in quenched wires

No Tc enhancement in quenched polycrystalline FeSe bulks

Abstract

Enhancements of superconducting properties were observed in FeSe wires using a quenching technique. Zero resistivity was achieved at about 10 K in quenched wires, which is about 2 K higher than that of polycrystalline FeSe bulk. Furthermore, transport Jc of quenched wires showed three times higher than that of furnace-cooled wires. In contrast, the quenched polycrystalline FeSe bulks did not show the enhancement of Tc. The quenching technique is a greatly promising for fabricating FeSe wires with high Tc and high Jc, and quenched FeSe wires have high potential for superconducting wire applications.