Advances in sustainable fluorine-free CSD YBa 2 Cu 3 O 7 thin films (original) (raw)

Low-Fluorine Ba-Deficient Solutions for High-Performance Superconducting YBCO Films

2021

High-performing superconducting YBa2Cu3O7–x (YBCO) films are fabricated by a chemical solution deposition methodology through novel barium-deficient low-fluorine solutions. The precursor solutions, distinguished for being straightforward, inexpensive and eco-friendly, allow us to reduce the growing temperature of YBCO down to 750 °C. We investigated the influence of the growing temperatures on both the microstructure and superconducting properties of YBCO films by using conventional thermal annealing and flash-heating approaches. A clear correlation between the growing temperature (Tg) and the superconducting performance of the films was obtained with improved performances observed at low Tg.

Production and Characterization of BaIrO3 Doped Superconducting YBCO Thin Films by TFA-MOD Method

2014

BaIrO 3 (BIO) doped YBa 2Cu 3O 7-δ (YBCO) superconducting thin films were prepared using yttrium, barium and copper acetate on SrTiO 3 (STO) single crystal substrates by Trifluoroacetic Acid-Metal Organic Deposition (TFA-MOD) method. The effect of added BIO nanoparticles on the film structure and superconducting properties were studied. Highly textured YBCO superconducting thin films on STO substrate were deposited by spin coating technique. Surface morphologies of the films were observed by Scanning Electron Microscopy (SEM) and the morphological quality of the thin films was determined through atomic force microscopy (AFM). The phase analyses of the films were investigated by X-Ray Diffractometer (XRD). In order to determine superconducting properties critical transition temperature (T c ) values of films were measured by using standart four point method. All YBCO films with BIO nanoparticles had T c values over 91K. Results indicate that BIO added YBCO films exhibit denser surfac...