Physical properties of the noncentrosymmetric superconductor Mg10Ir19B16

Specific heat, electrical resistivity, and magnetic susceptibility measurements on a high quality sample of Mg10Ir19B16 provide a self-consistent determination of its superconducting properties. They indicate that Mg10Ir19B16 is a type-II superconductor [TC=4.45K, κ(0) 20], with an electron-phonon coupling constant λep=0.66. An analysis of the T-dependent specific heat shows that superconducting properties are dominated by an s-wave gap (Δ=0.7meV). Point contact tunneling data provide evidence for multiple superconducting gaps, as expected from strong asymmetric spin-orbit coupling.