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Ultrafast transient liquid assisted growth of high current density superconducting films

AuthorsSoler, Laia; Jareño Cerulla, Julia ; Banchewski, Juri ; Rasi, Silvia ; Chamorro, Natalia; Guzmán, Roger ; Yáñez, Ramon; Mocuta, Cristian; Ricart, Susagna ; Farjas, J.; Roura Grabulosa, Pere; Obradors, Xavier ; Puig Molina, Teresa
KeywordsElectronic properties and materials
Superconducting properties and materials
Issue Date17-Jan-2020
PublisherNature Publishing Group
CitationNature Communications 11(1): 344 (2020)
AbstractThe achievement of high growth rates in YBa2Cu3O7 epitaxial high-temperature superconducting films has become strategic to enable high-throughput manufacturing of long length coated conductors for energy and large magnet applications. We report on a transient liquid assisted growth process capable of achieving ultrafast growth rates (100 nm s−1) and high critical current densities (5 MA cm−2 at 77 K). This is based on the kinetic preference of Ba-Cu-O to form transient liquids prior to crystalline thermodynamic equilibrium phases, and as such is a non-equilibrium approach. The transient liquid-assisted growth process is combined with chemical solution deposition, proposing a scalable method for superconducting tapes manufacturing. Additionally, using colloidal solutions, the growth process is extended towards fabrication of nanocomposite films for enhanced superconducting properties at high magnetic fields. Fast acquisition in situ synchrotron X-ray diffraction and high resolution scanning transmission electron microscopy (STEM) become crucial measurements in disentangling key aspects of the growth process.
Publisher version (URL)http://dx.doi.org/10.1038/s41467-019-13791-1
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