Synthesis and superconductivity in spark plasma sintered pristine and graphene-doped FeSe$_{0.5}$Te$_{0.5}$

Replace this text with your abstract body. Here, we present a new ball-milling and spark plasma sintering based technique for the facile synthesis FeSe$_{0.5}$Te$_{0.5}$ superconductors (SC) without the need for pre-alloying. This method is advantageous since it is quick and flexible for incorporating other dopants such as graphene for vortex pinning. We observed that FeSe$_{0.5}$Te$_{0.5}$ exhibits a coexistence of ferromagnetic (FM) and SC signature plausibly arising from a FM core-SC shell structure. More importantly, the Hc2 values observed from resistivity data are higher than 7 T indicating that SPS process synthesized FeSe$_{0.5}$Te$_{0.5}$ samples could lead to next{\-}generation superconducting wires and cables.