New Antiperovskite-Type Superconductor ZnNyNi3

We have synthesized a new superconductor ZnN y Ni 3 with T c ∼3 K. The crystal structure is of the same antiperovskite-type as MgCNi 3 and CdCNi 3 . As far as we know, this is the third superconducting material in the Ni-based antiperovskite series and the first antiperovskite nitride superconducting material. For this new superconductor, the lower critical field H c1 (0), upper critical field H c2 (0), coherence length ξ(0), penetration depth λ(0), Ginzburg–Landau parameter κ(0), electronic specific heat coefficient γ, and Debye temperature Θ D have been experimentally determined.