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This study employs a fluorine-free metal organic deposition method (FF-MOD), with transient liquid phase assistance, to expedite the growth (TLAG) of superconducting YBa 2 Cu 3 O 7-δ (YBCO) thin films on LaMnO 3 metal substrates. The research evaluates the phase formation and performance of YBCO films with varying proportions of preformed BaZrO 3 (BZO) nanocrystals. The experimental results indicate that the optimal proportion for incorporating BZO nanocrystals is 5 %, leading to the YBCO film displaying critical current density at 77 K under zero-field conditions. This achievement marks a significant advancement in the rapid growth of YBCO films on metal substrates with enhanced current-carrying capacity. Additionally, the research assesses the changes in overall uniformity and microstrain of YBCO films after the addition of BZO nanocrystals, shedding light on the key factors contributing to performance enhancement and offering insights for future improvements. This investigation offers valuable insights for attaining high-speed, high-performance growth of superconducting YBCO coating conductors. [Display omitted] [ABSTRACT FROM AUTHOR]

This study employs a fluorine-free metal organic deposition method (FF-MOD), with transient liquid phase assistance, to expedite the growth (TLAG) of superconducting YBa 2 Cu 3 O 7-δ (YBCO) thin films on LaMnO 3 metal substrates. The research evaluates the phase formation and performance of YBCO films with varying proportions of preformed BaZrO 3 (BZO) nanocrystals. The experimental results indicate that the optimal proportion for incorporating BZO nanocrystals is 5 %, leading to the YBCO film displaying critical current density at 77 K under zero-field conditions. This achievement marks a significant advancement in the rapid growth of YBCO films on metal substrates with enhanced current-carrying capacity. Additionally, the research assesses the changes in overall uniformity and microstrain of YBCO films after the addition of BZO nanocrystals, shedding light on the key factors contributing to performance enhancement and offering insights for future improvements. This investigation offers valuable insights for attaining high-speed, high-performance growth of superconducting YBCO coating conductors. [Display omitted] [ABSTRACT FROM AUTHOR]

• Zr, Zr-Hf-Sn, Zr-Hf-Sn-Ta and Zr-Hf-Sn-Ta-Mn co-doped YBa 2 Cu 3 O 7−δ (YBCO) were studied. • The YBCO films were prepared by low-fluorine metal-organic deposition method. • Multi-doping strategy can refine the heterogeneous phase. • The critical current density increases as the number of co-doped elements. Elemental doping has been proven effective in improving the flux pinning of yttrium barium copper oxide (YBa 2 Cu 3 O 7−δ , YBCO) nanocomposite thin films. In the present work, we increased the number of doping elements to five to investigate the flux pinning effect of YBCO. The Zr-doped, Zr, Hf and Sn co-doped, Zr, Hf, Sn and Ta co-doped, and Zr, Hf, Sn, Ta and Mn co-doped YBCO films deposited on LaMnO 3 /MgO/Y 2 O 3 /Al 2 O 3 / Hastelloy substrate were systematically studied. The samples were prepared by low-fluorine metal-organic deposition method, with a total dopant of 8 mol%. All films exhibit good c -axis growth and the multi-doping helps refining the surface particles, resulting in a smoother surface. The in-field properties of the films increase with the increase of co-doped element numbers, especially at a low temperature of 30 K. The pinning force density (F p) and critical current density (J c) are significantly improved by five-element Zr, Hf, Sn, Ta and Mn co-doped, which is about 3 times and 1.6 times higher, respectively, than that of the undoped film at 30 K and 1 T. [ABSTRACT FROM AUTHOR]

In this study, we employed the transient liquid-assisted growth (TLAG) process based on fluorine-free metal organic deposition (FF-MOD) to grow superconducting YBa 2 Cu 3 O 7-δ (YBCO) films on metal substrates. Specifically, we examined the impact of BaCO 3 decomposition on the generation of Ba-Cu-O liquid, the nucleation temperature of YBCO, and the growth orientation of YBCO. Moreover, we developed growth orientation phase diagrams for YBCO under different heating rates and oxygen partial pressures. Notably, rapid epitaxial growth was accomplished on LaMnO 3 buffer layers, with YBCO growth rates surpassing 60 nm/s. Furthermore, we investigated the correlation between non-uniform reactions during the YBCO growth on metal substrates and the performance of the resulting material. Our study has significantly contributed to the advancement of high-temperature superconducting coated conductors by addressing the need for efficient and high-performance fabrication of YBCO-coated conductors, thereby providing valuable insights and guidance in this field. [Display omitted] • Using TLAG-MOD, rapid preparation of YBCO films on LaMnO 3 substrate is achieved, with a growth rate of up to 60 nm/s. • This paper systematically investigates the influencing factors on the decomposition of BaCO 3 and its effects on the final orientation of YBCO film growth. • This work establishes a phase diagram for YBCO growth orientation, enabling flexible control and desired thin film orientation. • Researched the impact of secondary phases within YBCO films on their structure and performance. [ABSTRACT FROM AUTHOR]