Abstract
We have measured the specific heat down to 1.5 K of a collection of high-quality single crystals of \ensuremath{\kappa}-(ET${)}_{2}$Cu(NCS${)}_{2}$ in fields parallel to the crystalline ${a}^{\mathrm{*}}$ direction to 12.5 T. In this first determination of \ensuremath{\gamma}, we find \ensuremath{\gamma} to be 25\ifmmode\pm\else\textpm\fi{}3 mJ/${\mathrm{K}}^{2}$ mole. The anomaly in C at ${T}_{c}$ is quite distinct when compared to normal-state data obtained by suppressing ${T}_{c}$ with field. The value of \ensuremath{\Delta}C/\ensuremath{\gamma}T>2 obtained implies that this organic superconductor has strong coupling.
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