Magneto-optical imaging and transport properties of FeSe superconducting tapes prepared by diffusion method

TL;DR

This paper reports on the preparation of high-quality FeSe superconducting tapes via diffusion method, achieving significant critical current density and analyzing their magnetic and transport properties to inform improvements.

Contribution

It introduces a systematic approach to optimize FeSe tape quality and performance using diffusion method, with detailed analysis of their superconducting properties.

Findings

Critical current density up to 600 A/cm2 at 4.2 K

Magneto-optical images reveal Tc distribution and weak-link features

Insights into improving FeSe tape fabrication and performance

Abstract

High-quality FeSe tapes have been prepared by using a diffusion method. By adjusting the reaction temperature and the thickness systematically, a transport critical current density as high as 600 A/cm2 at 4.2 K under self field is achieved. Magneto-optical images indicate considerable distribution of Tc and weak-link features in the FeSe tape. This study gives some insight into how to improve the quality and performance of FeSe tapes and other superconducting tapes prepared through diffusion method further.