Observation of Zero Resistance in As-Electrodeposited FeSe

TL;DR

This study demonstrates the successful electrochemical deposition of FeSe superconducting films on textured substrates, achieving zero resistivity without post-deposition treatment, highlighting a potential scalable fabrication method.

Contribution

First demonstration of zero-resistance FeSe films directly electrodeposited on textured substrates, advancing scalable superconducting film fabrication techniques.

Findings

Zero resistivity observed in as-electrodeposited FeSe films.

Deposition conditions influence film composition and quality.

Electrochemical method enables direct superconducting film growth.

Abstract

Superconducting FeSe films were electrochemically deposited on rolling-assisted biaxially textured substrate (RABiTS) tape. We observed zero resistivity in the as-electrodeposited FeSe film prepared on the RABiTS when the appropriate voltage was applied while it was dipped into the solution. When the RABiTS tape was dipped in the solution without applying voltage, a thin Se film was deposited on the substrate. The compositional ratio of the FeSe film got closer to the stoichiometric ratio with decreasing the dipping time before applying voltage.