Smart meta-superconductor MgB(2) constructed by the dopant phase of luminescent nanocomposite

On the basis of the idea that the injecting energy will improve the conditions for the formation of Cooper pairs, a smart meta-superconductor (SMSC) was prepared by doping luminescent nanocomposite Y(2)O(3):Eu(3+)/Ag in MgB(2). To improve the superconducting transition temperature (T(C)) of the MgB(2)-based superconductor, two types of Y(2)O(3):Eu(3+)/Ag, which has the strong luminescence characteristic, with different sizes were prepared and marked as m-Y(2)O(3):Eu(3+)/Ag and n-Y(2)O(3):Eu(3+)/Ag. MgB(2) SMSC was prepared through an ex situ process. Results show that when the dopant content was fixed at 2.0 wt.%, the T(C) of MgB(2) SMSC increased initially then decreased with the increase in the Ag content in the dopant. When the Ag content is 5%, the T(C) of MgB(2) SMSC was 37.2–38.0 K, which was similar to that of pure MgB(2). Meanwhile, the T(C) of MgB(2) SMSC doped with n-Y(2)O(3):Eu(3+)/Ag increased initially then decreased basically with the increase in the content of n-Y(2)O(3):Eu(3+)/Ag, in which the Ag content is fixed at 5%. The T(C) of MgB(2) SMSC doped with 0.5 wt.% n-Y(2)O(3):Eu(3+)/Ag was 37.6–38.4 K, which was 0.4 K higher than that of pure MgB(2). It is thought that the doping luminescent nanocomposite into the superconductor is a new means to improve the T(C) of SMSC.