A Novel Partial Melting Process for YBa2Cu3O7−z Superconducting Films by Fluorine-Free Polymer-Assisted Metal Organic Deposition Approach

Development of a Fluorine-Free Polymer-Assisted-Deposition Route for YBa2Cu3O7−x Superconducting Films

“…For all three samples ΔT was situated in a narrow, 2-2.1 K, interval. The determined Tc values and transition widths are in good agreement with those reported for other PAD/CSD YBCO films [12,20,21]. Cation disorder present in the strained films pyrolyzed at lower temperatures determine a reduction of Tc [30].…”

“…In the high temperature regime, the sample heat treated at 550 °C has the highest Jc value. Also, the as reported values of Jc, are comparable with the values reported in other PAD/CSD grown layers [12,20,21]. To further investigate this behavior a fit of the Jc(T) dependencies was performed.…”

“…The solution pH was adjusted to a value of five with PEI. PEI addition also improves the precursor solution viscosity, wettability and stability [19,21].…”

“…The solution pH was adjusted to a value of five with PEI. PEI addition also improves the precursor solution viscosity, wettability and stability [19,21]. In order to remove uncoordinated species (cations/anions), the PAD precursor solution is filtered using Amicon ultrafiltration unit containing a PM10 ultrafiltration membrane.…”

“…Recently, a polymer-based chemical deposition method has been developed, which is becoming a promising alternative for the synthesis of oxide thin films [18], including YBCO layers [19][20][21]. Dense, epitaxial oxide thin films were initially obtained by Jia et al [22] using the polymer-assisted deposition (PAD) method showing a large improvement in the crystallinity and structural quality with respect to most of the previous CSD approaches [23].…”