Superconducting properties of (Y1−xEux)Ba2Cu3Oy-coated conductors prepared via trifluoroacetate–metalorganic deposition

Abstract

In order to investigate the effect of the partial substitution of Y by Eu on the superconducting properties of REBa2Cu3Oy (RE: rare earth) films, we fabricated trifluoroacetete-metalorganic deposited Y1-xEuxBa2Cu3Oy, (x = 0.1, 0.23 0.3, 0.4, 0.5) films on metallic substrates with optimal crystallization conditions. The optimized crystallization conditions for fabricating Y1-xEuxBa2Cu3Oy coated conductors with high x composition are relatively high crystallization temperature and low oxygen pressure comparing with YBa2Cu3Oy. The films with high χ exhibit a high critical temperature, irreversible fields, and high critical current density in the high-magnetic region at 77 K. However, the superiority on the critical current density of the films with high χ in self and low fields at 77 K is not necessary conformed. This behavior might be explained by the influence of the melt-growth mode in the film with high x.