Relationship between the of Smart Meta-Superconductor Bi(Pb)SrCaCuO and Inhomogeneous Phase Content.

A smart meta-superconductor Bi(Pb)SrCaCuO (B(P)SCCO) may increase the critical transition temperature () of B(P)SCCO by electroluminescence (EL) energy injection of inhomogeneous phases. However, the increase amplitude Δ (ΔTC=TC-TC,pure) of is relatively small. In this study, a smart meta-superconductor B(P)SCCO with different matrix sizes was designed. Three kinds of raw materials with different particle sizes were used, and different series of YO:Sm, YO, YO:Eu, and YO:Eu+Ag-doped samples and pure B(P)SCCO were prepared. Results indicated that the of the YO or YO:Sm non-luminescent dopant doping sample is lower than that of pure B(P)SCCO. However, the of the YO:Eu+Ag or YO:Eu luminescent inhomogeneous phase doping sample is higher than that of pure B(P)SCCO. With the decrease of the raw material particle size from 30 to 5 μm, the particle size of the B(P)SCCO superconducting matrix in the prepared samples decreases, and the doping content of the YO:Eu+Ag or YO:Eu increases from 0.2% to 0.4%. Meanwhile, the increase of the inhomogeneous phase content enhances the Δ. When the particle size of raw material is 5 μm, the doping concentration of the luminescent inhomogeneous phase can be increased to 0.4%. At this time, the zero-resistance temperature and onset transition temperature of the YO:Eu+Ag doped sample are 4 and 6.3 K higher than those of pure B(P)SCCO, respectively.