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

Improving the critical transition temperature ( T C ) 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 Y 2 O 3 :Eu 3+ +Ag or Y 2 O 3 :Eu 3+ luminophore was designed. In the applied electric field, the Y 2 O 3 :Eu 3+ +Ag or Y 2 O 3 :Eu 3+ luminophore generates an electroluminescence (EL), thereby, promoting the T C via EL energy injection. A series of Y 2 O 3 :Eu 3+ +Ag or Y 2 O 3 :Eu 3+ luminous inhomogeneous phase-doped B(P)SCCO samples was prepared. Meanwhile, the B(P)SCCO sample doped with 0.2 wt% Y 2 O 3 or Y 2 O 3 :Sm 3+ nonluminous inhomogeneous phase was also prepared. Results indicated that the T C of 0.2 wt% Y 2 O 3 or Y 2 O 3 :Sm 3+ doping sample is lower than that of pure samples. However, the T C of the sample doped with 0.2 wt% Y 2 O 3 :Eu 3+ +Ag or Y 2 O 3 :Eu 3+ luminophore is higher than that of pure sample. This outcome further demonstrated that the smart metastructure method can improve the T C of B(P)SCCO.