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By using a hydrothermal method, we have successfully grown crystals of thenewly discovered superconductor FeS, which has an isostructure of the ironbased superconductor FeSe. The superconductivity appears at about 4.5K, asrevealed by both resistive and magnetization measurements. It is found that theupper critical field is relatively low, with however an rather large anisotropy$\Gamma=[(dH_{c2}^{ab}/dT)/(dH_{c2}^{c}/dT)]_{T_c}\approx5.8$. A hugemagnetoresistivity (290$\%$ at 9T and 10K, ${H}$ $\parallel$ c-axis) togetherwith a non-linear behavior of Hall resistivity vs. external field are observed.A two-band model is applied to fit the magnetoresistance and non-lineartransverse resistivity, yielding the basic parameters of the electron and holebands.

Multi-band superconductivity and large anisotropy in FeS crystals