Superconducting properties of FeSe wires and tapes prepared by gas diffusion technique

TL;DR

This paper reports a novel gas diffusion method for fabricating FeSe superconducting wires and tapes, achieving a zero resistivity at 9.3 K and a critical current density of 137 A/cm^2, indicating promising potential for high-quality superconducting applications.

Contribution

The study introduces a new gas diffusion technique for producing FeSe superconducting wires and tapes with promising structural and electrical properties.

Findings

Achieved tetragonal FeSe phase via gas diffusion

Zero resistivity transition at 9.3 K

Critical current density of 137 A/cm^2 at 4 K

Abstract

Superconducting FeSe in the form of wires and tapes were successfully fabricated using a novel gas diffusion procedure. Structural analysis by mean of x-ray diffraction shows that themain phase of tetragonal PbO-type FeSe was obtained by this synthesis method. The zero resistivity transition temperature of the FeSe was confirmed to be 9.3 K. The critical current density as high as 137 A/cm^2 (4 K, self field) has been observed. The results suggest that the diffusion procedure is promising in preparing high-quality FeSe wires and tapes.