Superconducting properties of the misfit-layer compound (SnSe)1.18(TiSe2)2

We report the superconducting properties in the misfit layered compound (SnSe)1.18 (TiSe2)2 with critical temperature Tc=3.3 K at ambient pressure. Even though this compound is a polycrystalline compound, it shows anisotropic properties from the X‐ray diffraction, electrical transport, magnetization, and high‐resolution transmission electron microscopy measurements. The anisotropic parameter γHc2 of the compound is about 1.55 which is obtained from the superconducting parameters of the zero‐temperature‐limit upper critical field Hc2(0) and coherence length ξ using the Werthamer–Helfand–Hohenberg (WHH) formula. The small values of specific heat jump ΔC/γTc and electron–phonon coupling constant λe−ph indicate a weak‐coupling BCS superconductor. The critical current density is exceptionally high (8000 A cm−2) compared to other misfit‐layer superconductors. Isothermal hysteresis of magnetization, and critical current density (inset), with respect to the applied magnetic field for various temperatures.