Intermediate Phase Evolution of YBCO Superconducting Films Fabricated by Fluorine Free MOD Method

Zuo, J L; Zhao, Yixin; Wu, Wei; Wu, Xinye; Zhang, Zewei; Hong, Zhi; Jin, Z. J.

doi:10.1088/1742-6596/1054/1/012010

Cited by 5 publications

(2 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Additionally, FF precursors are more environmentally friendly than fluorinated precursors, because they do not generate hydrofluoric acid as a decomposition product. In particular, FF solutions based on acetate salts dissolved in excess propionic acid − have gained attention. In these solutions, exchange of acetate groups for propionates takes place, with formation of the corresponding propionate salts.…”

Section: Introductionmentioning

confidence: 99%

Relevance of the Formation of Intermediate Non-Equilibrium Phases in YBa₂Cu₃O_7–x Film Growth by Transient Liquid-Assisted Growth

et al. 2020

View full text Add to dashboard Cite

Transient liquid-assisted growth (TLAG) is a non-equilibrium ultrafast method to grow YBa2Cu3O7–x (YBCO) superconducting films at up to 100 nm/s using chemical solution deposition. In this work, we study the formation of non-equilibrium crystalline intermediate phases prior to the growth of YBCO through TLAG. We analyze the thermal decomposition and microstructural evolution of a propionate-based fluorine-free solution used as precursor to YBCO epitaxial films. Thermal analyses (TGA, DSC), coupled with techniques to monitor the volatiles (TG-IR), were applied in situ during film pyrolysis in humid O2, while the thermal evolution of the solid residue was characterized by infrared spectroscopy and X-ray diffraction, both ex situ and in situ in synchrotron radiation sources, and by scanning transmission electron microscopy (STEM) and electron energy loss spectroscopy (EELS) cross-sectional analysis. Unexpected effects, observed during the decomposition of the ternary solution, are the formation of intermediate non-equilibrium phases: Cu2O or Cu(0) and monoclinic BaCO3. We emphasize that working with anhydrous solutions and anhydrous deposition conditions promotes the formation of the expected equilibrium phases. Finally, in situ X-ray diffraction permits monitoring the influence of the non-equilibrium monoclinic BaCO3 phase on the formation of binary oxide phases, precursors of TLAG YBCO film growth. Understanding the evolution of non-equilibrium phases is shown to be fundamental for the control of the final YBCO film’s microstructure and performance, since the latter are strongly affected by the film’s thermal history after solution deposition.

show abstract

Section: Introductionmentioning

confidence: 99%

Relevance of the Formation of Intermediate Non-Equilibrium Phases in YBa₂Cu₃O_7–x Film Growth by Transient Liquid-Assisted Growth

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Several studies showed the use of acetates of yttrium, barium, and copper as precursors for the preparation of fluorine-free YBCO precursor solutions through dissolution in HProp-based media. − However, complete conversion of acetates into propionates is never assured; specifically, in the case of barium acetate, even in conditions of excess of HProp, only a mixed complex of Ba-Prop-Ac can be obtained . The synthesis of propionates of yttrium, barium, and copper was found to be imperative to avoid the presence of product mixtures in solution that may endure different decomposition paths, hindering an optimal and reproducible result of the final precursor films.…”

Section: Resultsmentioning

confidence: 99%

Chemical and Microstructural Nanoscale Homogeneity in Superconducting YBa₂Cu₃O_7–x Films Derived from Metal-Propionate Fluorine-free Solutions

Saltarelli

Gupta

Rasi

et al. 2022

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

Research involved in developing alternative energy sources has become a necessity to face global warming. In this context, superconductivity is an appealing solution to enhance clean electrical energy provided that lower production costs can be attained. By implementation of chemical solution deposition techniques and high-throughput growth methods, low-cost nanostructured epitaxial cuprate superconductors are timely candidates. Here, we present a versatile and tunable solution method suitable for the preparation of high-performance epitaxial cuprate superconducting films. Disregarding the renowned trifluoroacetate route, we center our focus on the transient liquid-assisted growth (TLAG) that meets the requirement of being a greener chemical process together with ultrafast growth rates beyond 100 nm/s. We developed a facile, fast, and cost-effective method, starting from the synthesis of metal-propionate powders of Y, Ba, and Cu of high purity and high yields, being the precursors of the fluorine-free solutions, which enable the chemical and microstructural nanoscale homogeneity of YBa2Cu3O7–x (YBCO) precursor films. These solutions present endured stability and enable precise tunability of the composition, concentration, porosity, and film thickness. Homogeneous precursor films up to thicknesses of 2.7 μm through eight layer multidepositions are demonstrated, thus establishing the correct basis for epitaxial growth using the fast kinetics of the TLAG process. YBCO films of 500 nm thickness with a critical current density of 2.6 MA/cm2 at 77 K were obtained, showing the correlation of precursor film homogeneity to the final YBCO physical properties.

show abstract

Fabrication of YBCO Thin Films by Fluorine-Free MOCSD Method: Influence of Sintering Near the Melting Point

Rasti

2020

IEEE Trans. Appl. Supercond.

View full text Add to dashboard Cite

Intermediate Phase Evolution of YBCO Superconducting Films Fabricated by Fluorine Free MOD Method

Cited by 5 publications

References 15 publications

Relevance of the Formation of Intermediate Non-Equilibrium Phases in YBa₂Cu₃O_7–x Film Growth by Transient Liquid-Assisted Growth

Relevance of the Formation of Intermediate Non-Equilibrium Phases in YBa₂Cu₃O_7–x Film Growth by Transient Liquid-Assisted Growth

Chemical and Microstructural Nanoscale Homogeneity in Superconducting YBa₂Cu₃O_7–x Films Derived from Metal-Propionate Fluorine-free Solutions

Fabrication of YBCO Thin Films by Fluorine-Free MOCSD Method: Influence of Sintering Near the Melting Point

Contact Info

Product

Resources

About

Intermediate Phase Evolution of YBCO Superconducting Films Fabricated by Fluorine Free MOD Method

Cited by 5 publications

References 15 publications

Relevance of the Formation of Intermediate Non-Equilibrium Phases in YBa2Cu3O7–x Film Growth by Transient Liquid-Assisted Growth

Relevance of the Formation of Intermediate Non-Equilibrium Phases in YBa2Cu3O7–x Film Growth by Transient Liquid-Assisted Growth

Chemical and Microstructural Nanoscale Homogeneity in Superconducting YBa2Cu3O7–x Films Derived from Metal-Propionate Fluorine-free Solutions

Fabrication of YBCO Thin Films by Fluorine-Free MOCSD Method: Influence of Sintering Near the Melting Point

Contact Info

Product

Resources

About

Relevance of the Formation of Intermediate Non-Equilibrium Phases in YBa₂Cu₃O_7–x Film Growth by Transient Liquid-Assisted Growth

Relevance of the Formation of Intermediate Non-Equilibrium Phases in YBa₂Cu₃O_7–x Film Growth by Transient Liquid-Assisted Growth

Chemical and Microstructural Nanoscale Homogeneity in Superconducting YBa₂Cu₃O_7–x Films Derived from Metal-Propionate Fluorine-free Solutions