# Fabrication of Superconducting YBa2Cu4O8 Film via Coprecipitation

## TL;DR

This paper reports a successful method for fabricating superconducting YBa2Cu4O8 films on SrTiO3 substrates using coprecipitation and dip-coating, achieving superconductivity near 70 K, which is promising for technological uses.

## Contribution

The paper introduces a novel coprecipitation and dip-coating process for synthesizing superconducting YBa2Cu4O8 films on SrTiO3 substrates.

## Key findings

- Superconducting transition observed at 64-70 K.
- YBa2Cu4O8 films are c-axis oriented.
- Method is suitable for technological applications.

## Abstract

We have successfully synthesized the c-axis oriented YBa2Cu4O8 (Y-124) film on a SrTiO3 (1 0 0) substrate via a coprecipitation and a dip-coating method. The precipitations including Y, Ba and Cu ions were obtained using their metal nitrates solution and the aqueous solution of sodium hydroxide and oxalic acid. Superconducting transition of the synthesized film was observed at 64-70 K corresponding to bulk Y-124 in the magnetization and resistance measurement. The developed method is suitable to synthesize superconducting Y-124 films for technological applications.