Metal Propionate Solutions for High-Throughput Liquid-Assisted Manufacturing of Superconducting REBaCuO (RE = Y, Gd, Sm, and Yb) Films

Overview

Journal ACS Appl Mater Interfaces

Publisher American Chemical Society

Specialties Biomedical Engineering
Biotechnology

Date 2024 Sep 26

PMID 39324829

Authors

Lavinia Saltarelli

Daniel Sanchez-Rodriguez

Kapil Gupta

Aiswarya Kethamkuzhi

Jordi Farjas

Elies Molins

Ramon Yanez

Susagna Ricart

Xavier Obradors

Teresa Puig

Affiliations

Soon will be listed here.

Abstract

The cost-effective synthesis of a series of metal propionate powders (copper, yttrium, barium, samarium, gadolinium, and ytterbium) is developed through single chemical reactions resulting in five novel crystalline forms. These complexes are valuable precursors for the preparation of epitaxial REBaCuO (REBCO) superconducting films (here, RE = Y, Sm, Gd, and Yb) through the innovative transient liquid-assisted growth (TLAG) process based on chemical solution deposition (CSD). TLAG-CSD shows impressive results with YBaCuO (YBCO), obtaining critical current densities of 2.6 MA/cm (77 K) on 500 nm films at unprecedented growth rates (50-2000 nm/s), boosting unprecedented high-throughput industrial production. With a cardinal concern on designing the pyrolysis toward optimal nanocrystalline films for TLAG, an analysis of the thermal behavior of the synthesized precursors is essential. Decomposition pathways for each metal propionate are established, and compatibility with TLAG-CSD is corroborated. Metal-organic solutions for these REBCO systems are successfully prepared, and their rheological properties and thermal behavior are analyzed. This work demonstrates homogeneous nanocrystalline films through propionate-based REBCO precursor solutions, including several rare-earth ions, which display exemplary chemical and microstructural characteristics crucial for TLAG, and provides a base for a wide variety of CSD-based functional oxides.

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