A significant improvement in the superconducting properties of MgB2 by co-doping with graphene and nano-SiC

The effects of graphene (G) and nanosilicon carbide (SiC) co-doping on the superconducting properties of MgB 2 were studied using bulk samples. SiC remains one of the best dopants which can significantly improve the high field performance, while graphene is emerging as a new dopant for MgB 2 , which can improve the zero field critical current density ( J c ). The superconducting properties characterized by J c , the intergrain connectivity, and the critical fields were significantly improved by the use of both SiC and graphene as dopants.

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