Strong enhancement flux pinning in MOD-YBa 2 Cu 3 O 7−x films with self-assembled BaTiO 3 nanocolumns

Enhanced flux pinning of solution-derived YBa2Cu3O7−x nanocomposite films with novel ultra-small BaMnO3 nanocrystals

“…The fabrication technology of second generation high-temperature superconductor YBa 2 Cu 3 O 7−x (YBCO) coated conductors (CCs) has been continuously developing in recent years. Several methods are available for the manufacture of YBCO thin films, such as pulsed laser deposition (PLD) [1][2][3], metal-organic chemical vapor deposition [4,5] and trifluoroacetate metal-organic deposition (TFA-MOD) [6][7][8][9]. The TFA-MOD method, transforming the homogeneous, stable and stoichiometric precursor solution prepared with organic salts of Y, Ba, Cu and doped elements to YBCO epitaxial composite film, has been widely accepted as one of the most potential routes for the fabrication of CCs because of its low cost and capacity for mass production [10].…”

Optimizing Nanocomposites through Nanocrystal Surface Chemistry: Superconducting YBa2Cu3O7 Thin Films via Low-Fluorine Metal Organic Deposition and Preformed Metal Oxide Nanocrystals

“…This solution approach offers a less expensive route to the coated conductors design, being more scalable and faster compared to vacuum deposition methods. CSD has explored the fabrication of nanocomposite thin films with the formation of effective artificial pinning centers by the addition of excess metal salts to the YBCO precursor solution, resulting in the spontaneous segregation of non-superconducting secondary phases such as Y 2 O 3 , Ba­SnO 3 , Ba­HfO 3 , Ba­ZrO 3 , and Ba 2 Y­TaO 6 . − However, this approach offers limited control on the formation and size distribution of the nanostructures and faces issues with reproducibility. To reproducibly gain control over the final microstructural properties of the nanocomposite thin films, we opted to synthesize colloidally stable nanocrystals in advance and add them to the YBCO precursor solution (Figure , stage I).…”

Influence of surface coating on the microstructures and dielectric properties of BaTiO3 ceramic via a cold sintering process

“…The Ba 3d spectrum consists of two peaks, one at 778.82 eV and one at 794.12 eV, which are identied with the Ba-O bond, whereas the two subpeaks Ba 3d 5/2 (777.93 eV) and Ba 3d 3/2 (793.15 eV) are identied with BaCO 3 and/or the relaxed Ba phase and are probably caused by oxygen vacancies and other residual defects. 31,32 The Ti 2p peaks shown in Fig. 6(a)-(d) can be resolved into two components (Ti 2p 3/2 at 457.78 eV and Ti 2p 1/2 at 463.49 eV), which correspond to Ti 4+ in BaTiO 3 .…”