The Effect of Heating Temperature in Ultraviolet Irradiation Process on Properties of YBa2Cu3O7-x Superconducting Films Processed From Photosensitive Solution
The effects of heating temperature in ultraviolet irradiation process (hereafter named as UV temperature) on photon-activated precursor YBa<sub>2</sub>Cu<sub>3</sub>O<sub>7-</sub><italic><sub>x</sub></italic> (YBCO) films were investigated systemically. The results from FT-IR spectra, carbon content, the XPS spectra of Cu 2p and O1s reflected that the photochemical reactions were inhibited by high UV temperature. And we proposed a model to analyze and explain the mechanism of how the UV temperature affect the photochemical reactions. Finally, the YBCO films irradiated at 100 or 150 °C had higher <italic>Jc</italic> values (about 7.0 MA/cm<sup>2</sup> at 77 K and 0 T) than samples UV-irradiated under high UV temperatures (beyond 200 °C), which showed lower <italic>Jc</italic> values due to the weakening of oxidation progress. Consequently, a temperature window of 100–150 °C in UV irradiation process maybe suitable for the deep UV irradiation method used in YBCO preparation.