Investigation of Ce2Pd3Si5 at pressures to 9.5 GPa

We have performed pressure-dependent electrical resistivity measurements of a single crystal Ce2Pd3Si5, which is an antiferromagnetic Kondo lattice compound, at pressures up to 9.5 GPa and at temperatures down to similar to 0.4 K. As the pressure is increased, the Neel temperature T-N deduced from the temperature dependence of resistivity decreases steeply above 4.8 GPa and disappears at P >= 8.6 GPa. Both A and rho(0) values in Fermi liquid law rho = rho(0) + AT(2) at low temperature region increase abruptly above 4.8 GPa and exhibit a plateau at similar to 9 GPa. These results suggest that non-magnetic state could be formed at P >= 8.6 GPa and that possible quantum critical point might exist at pressures around 9 GPa in this compound. However, there is no sign of superconductivity in resistivity data at the lowest temperature we studied around the possible QCP. (c) 2007 Elsevier B.V. All rights reserved.