Preparation and characterization of a new graphite superconductor: Ca_0.5Sr_0.5C₆.

ABSTRACT: We have produced a superconducting binary-elements intercalated graphite, Ca_xSr_1-xC_y, with the intercalation of Sr and Ca in highly-oriented pyrolytic graphite; the superconducting transition temperature, T _c, was ~3 K. The superconducting Ca_xSr_1-xC_y sample was fabricated with the nominal x value of 0.8, i.e., Ca_0.8Sr_0.2C_y. Energy dispersive X-ray (EDX) spectroscopy provided the stoichiometry of Ca_0.5(2)Sr_0.5(2)C_y for this sample, and the X-ray powder diffraction (XRD) pattern showed that Ca_0.5(2)Sr_0.5(2)C_y took the SrC₆-type hexagonal-structure rather than CaC₆-type rhombohedral-structure. Cons

SUBMITTER: Nishiyama S 

PROVIDER: S-EPMC5547157 | biostudies-literature | 2017 Aug

REPOSITORIES: biostudies-literature