Investigating the Impact of BaCuO2-CuO Ratio on YBCO Thin Film Growth via Transient Liquid-Assisted Fluorine-Free Metal Organic Deposition

Abstract

This article utilizes a fluorine-free metal organic deposition method (FF-MOD) combined with transient liquid-assisted growth (TLAG) technology to prepare $\text{YBa}_{2}\text{Cu}_{3}\text{O}_{7-\delta }$ (YBCO) superconducting thin films, achieving growth rates exceeding 60 nm/s on metallic substrates. A bilayer coating method was employed, introducing a layer of fluorine-containing material of varying thickness before applying the fluorine-free layer. This approach allowed the adjustment of carbon content in the FF layer through the diffusion of fluorine. Ultimately, different $\text{BaCuO}_{2}-\text{CuO}$ ratio bilayer films were obtained during the crystallization process to study their effects on the generation of Ba-Cu-O liquid phase, as well as the growth rate, orientation, and texture of YBCO. This research contributes to a deeper understanding of the reaction processes and mechanisms for achieving rapid growth of YBCO films based on the Ba-Cu-O liquid phase, addressing gaps in the field and providing valuable guidance.