Superconductivity in Centrosymmetric TaCx with x = 0.0, 1.25, and 1.50

Abstract

In this research work, we report the synthesis, crystal structure, Raman Study, and magnetic properties at low temperatures of TaCx (x = 0.00, 1.25, and 1.50) compounds. The experiments are performed on polycrystalline samples synthesized by an arc melting method. The samples show a cubic phase with FFC structure measurements by XRD and were further analyzed by Rietveld refinements in which the small impurity of the Ta2C and T2O5 was detected. Raman spectroscopy shows the characteristics of TaC peaks being associated with disordered band (D) and graphitic band (G). The transmission electron microscopy study was performed to obtain the morphology, size, and microstructure of the samples. The magnetic property magnetization curves in zero field cooling (ZFC) and field cooling (FC) modes reveal that the system is characterized as a type II superconductor. The most important aspect of this study is observed with the increase of C doping amount; the Tc presents a slightly increasing tendency from 9 K to 9.5 K.