Superconducting FeSe film made by electrochemical deposition

FeSe films were electrochemically deposited on rolling-assisted biaxially textured substrate (RABiTS) tape and, we observed zero resistivity in the as-electrodeposited film without annealing. We investigated the influence of dipping time in a reaction solution before applying voltages. When the RABiTS tape was dipped in the solution, a thin Se film formed on the substrate before voltage was applied, and then the FeSe film was deposited on the tape by applying voltage. The compositional ratio of the FeSe film deviated from the stoichiometric ratio as the dipping time increased before applying voltage. We observed zero resistivity in the as-electrodeposited FeSe film prepared on the substrate when it was dipped into the solution while applying voltage.[1,2]
Reference:
[1] S. Demura et al., J. Phys. Soc. Jpn. 81, 043702 (2012)
[2] A.Yamashita et al., J. Phys. Soc. Jpn. 86, (2017)