Pressure effect on magnetism and superconductivity in CePt3Si

Abstract: Magnetism and superconductivity in the heavy-fermion superconductor have been studied under pressure. The antiferromagnetic and superconducting transition temperatures, and , respectively, decrease by applying pressure. becomes zero around 0.6–0.7GPa, while the pressure dependence of exhibits a shoulder-like feature around 0.7GPa, and superconductivity is found to persist in the pressure range up to about 1.5GPa. A broad peak around 5K in the temperature derivative of thermal expansion and electrical resistivity at ambient pressure begins to shift to higher temperatures above 0.7GPa. These results suggest that a critical pressure exists around 0.6–0.7GPa in . [Copyright &y& Elsevier]