Smart Metastructure Method for Increasing T C of Bi(Pb)SrCaCuO High-Temperature Superconductors

Improving the critical transition temperature (TC) of Bi(Pb)SrCaCuO (B(P)SCCO) high-temperature superconductors is important; however, considerable challenges exist. In this study, on the basis of the metamaterial structure and the idea that injecting energy will promote the formation of electron pairs, a smart meta-superconductor B(P)SCCO consisting of B(P)SCCO microparticles and Y2O3:Eu3++Ag or Y2O3:Eu3+ luminophore was designed. In the applied electric field, the Y2O3:Eu3++Ag or Y2O3:Eu3+ luminophore generates an electroluminescence (EL), thereby, promoting the TC via EL energy injection. A series of Y2O3:Eu3++Ag or Y2O3:Eu3+ luminous inhomogeneous phase-doped B(P)SCCO samples was prepared. Meanwhile, the B(P)SCCO sample doped with 0.2 wt% Y2O3 or Y2O3:Sm3+ nonluminous inhomogeneous phase was also prepared. Results indicated that the TC of 0.2 wt% Y2O3 or Y2O3:Sm3+ doping sample is lower than that of pure samples. However, the TC of the sample doped with 0.2 wt% Y2O3:Eu3++Ag or Y2O3:Eu3+ luminophore is higher than that of pure sample. This outcome further demonstrated that the smart metastructure method can improve the TC of B(P)SCCO.