Further pressure studies around the magnetic instability of CePd2Si2

Using helium as a pressure-transmitting medium in a diamond anvil cell enab led a high-quality sample of the antiferromagnet CePd2Si2 to be studied in a highly hydrostatic environment. With the aid of a low-temperature force-m odulation device, ac calorimetric measurements were made up to 25 kbar and resistivity measurements up to 33 kbar, on both sides of P-C, found between 28 and 29.5 kbar. The narrow superconducting, domain found around P-C indi cates the connection between the magnetic instability and the formation of Cooper pairs. We assert that there is an influence of the residual resistiv ity both on the emergence of superconductivity, and on the corresponding tr ansition width. Close to P-C, the temperature dependence of the resistivity in the normal state qualitatively agrees with the spin-fluctuation model. While standard Fermi liquid behaviour was found to break down in the immedi ate vicinity of P-C, it reappeared below 700 mK at 33 kbar, less than 5 kba r above.