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REBCO mixtures with large difference in rare-earth ion size: superconducting properties of chemical solution deposition-grown Yb1−xSmxBa2Cu3O7−δ films

Citation

CAYADO, PABLO (2020), REBCO mixtures with large difference in rare-earth ion size: superconducting properties of chemical solution deposition-grown Yb1−xSmxBa2Cu3O7−δ films, Dryad, Dataset, https://doi.org/10.5061/dryad.jsxksn06p

Abstract

Yb1-xSmxBa2Cu3O7-d films have been prepared by chemical solution deposition following the Extremely-Low-Fluorine route, which allows reducing the fluorine content by 93% with respect to standard TFA solutions. The obtained results show that, on the one hand, Tc remains stable at ~ 90 K with Sm content up to x = 0.5 where Tc starts to increase towards the values of pure SmBCO films of ~ 95 K. On the other hand, the critical current densities Jc of the pure SmBCO films are the largest at 77 K, where the influence of a higher Tc is very relevant, while at lower temperatures and low fields, the mixed films reach larger values. This demonstrates that mixing rare earth elements RE in REBa2Cu3O7-d causes a change in the pinning properties of the films and reveals the importance of selecting adequate REBCO compounds according to the temperature and magnetic field region where a specific application operates.