Temperature-pressure phase diagram of hydrogenated and deuterated /spl kappa/-(BEDT-TTF)/sub 2/Cu[N(CN)/sub 2/]Cl

Summary form only given. The title compound is noted to give the highest superconducting transition temperature T/sub c/=13 K among the organic superconductors to date at pressure above 300 bar. This salt is insulating at ambient pressure and shows weak ferromagnetism below 22 K. In the low pressure region 300-700 bar we confirmed the competition between superconducting and non-metal phases and shows reentrant behavior. We report dc SQUID measurements at ambient pressure and resistivity measurement in an applied hydrostatic pressure on hydrogenated and deuterated /spl kappa/-(BEDT-TTF)/sub 2/Cu[N(CN)/sub 2/]Cl and discuss the effects of isotope substitution of terminal ethylene groups on temperature-pressure phase diagram of this salt.