Abstract
Transport measurements have been carried out on single crystals of the charge transfer salt β″-(BEDT-TTF)[(HO)Ga(CO)]. CHNO, using magnetic fields of up to 33 T and temperatures down to 0.55 K. The material is found to be superconducting with T ≈ 7.5 K and an in-plane critical field B ≥ 33 T, and to exhibit Shubnikov-de Haas (SdH) oscillations. The temperature and angle dependence of the Shubnikov-de Haas oscillations and the upper critical field are reported, allowing information about the anisotropy of the upper critical field, effective mass m*, and the Fermi-surface (FS) of the material to be deduced.