Improving the Critical Temperature of MgB2 Superconducting Metamaterials Induced by Electroluminescence

The MgB2 superconductor was doped with electroluminescent Y2O3:Eu, to synthesise a superconducting metamaterial. The temperature dependence of the resistivity of the superconductor indicates that the critical temperature (T (C)) of samples decreases when increasing the amount of doped Y (2) O (3) nanorods, due to impurity (Y (2) O (3), MgO and YB (4)). However, the T (C) of the samples increase with increasing amount of doped Y (2) O (3):Eu (3+) nanorods, which are opposite to doped Y (2) O (3) nanorods. Moreover, the transition temperature of the sample doped with 8 wt % Y (2) O (3):Eu (3+)nanorods is higher than those of doped and pure MgB (2). The T (C) of the sample doped with 8 wt % Y (2) O (3):Eu (3+) nanorods is 1.15 K higher than that of the sample doped with 8 wt % Y (2) O (3). The T (C) of sample doped with 8 wt% Y (2) O (3):Eu (3+) is 0.4 K higher than that of pure MgB (2). Results indicate that doping electroluminescent materials into MgB (2) increases the transition temperature; this novel strategy may also be applicable to other superconductors.