Research of YBa2Cu3O7-x/SrTiO3 superconductive properties

Author: Tornike Tchabukiani
Co-authors: D. Daraselia,D. Japaridze, Z. Jibuti A. Shengelaya
Keywords: YBCO, STO, Superconductor, rapid thermal process
Annotation:

Superconducting properties of YBa2Cu3O7-x (YBCO)/SrTiO3 (STO) polycrystalline composites were investigated. The composites were obtained by rapid thermal processing of the 20% YBCO–80% STO mixtures in the air in the temperature range 700–1000 °C for 2 min. Magnetization measurements showed that the superconducting critical temperature (Tc) is practically notchanged if optimally doped YBCO is used in YBCO/STO composites. In contrast, a strong increase of Tcfrom 65 to 90 K wasfound in the case of underdoped YBCO. This increase of Tccan be explained by unusually fast diffusion of oxygen from STO toYBCO grains in sintered composites. Obtained results show that the YBCO oxidation process can be significantly accelerated inunderdoped YBCO/STO composites during rapid high-temperature processing.