Upper Critical Field Measurements up to 600 kG in PbMo6S8

Upper critical field, H c2 ( T ), of PbMo 6 S 8 was measured in a temperature region from 1.3 K to the superconducting transition temperature, T c , using pulsed magnetic fields. Extrapolation to zero temperature indicates that H c2 (0) is about 600 kG with T c =13.3 K.