Pressure dependence of Tc in Ba2CaCu2O4(O,F)2

Pressure dependence of superconducting transition temperature Tc in double-layered, apical fluorine cuprate Ba2CaCu2O4(O,F)2 (F-02(n-l)n system, n=2) has been studied under high pressure up to 17 GPa. Tcs are determined by the observations of the electrical resistivity. Tc increased monotonously from 106 K to 120 K at around 10 GPa, however it was suddenly saturated to go up above 10 GPa. The increasing rate of the transition temperature, d Tc / dP, is 3.2 K / GPa at around atmospheric pressure. Tc reaches 124 K at 17 GPa, which is the highest observed Tc in apical fluorine system.