PRESSURE-TEMPERATURE PHASE-DIAGRAM OF UPD2SI2 AND UNI2SI2

It is well established that the ternary intermetallic family of compou nds UT2Si2, where T denotes a transition metal, shows a rich variety o f electronic and magnetic ground-state properties. In order to better understand the magnetic properties of these materials, we have investi gated the behavior of the electrical resistivity of UNi2Si2 and UPd2Si 2 as a function of temperature and pressure. In the case of UNi2Si2, t he proposed pressure-temperature phase diagram is very similar to its magnetic-field-temperature phase diagram. The pressure-temperature pha se diagram obtained for both compounds is also compared to predictions made using a mean-field Landau-type analysis.