THE HEAVY-FERMION SUPERCONDUCTOR UPD2AL3 AT VERY HIGH-PRESSURE

We studied the pressure dependence of the Neel temperature and the sup erconducting critical temperature of the heavy-fermion superconductor UPd2Al3 at pressures up to 13.6 GPa by means of resistivity measuremen ts. The pressure variation of the normal state resistivity is dominate d by a large shift of the resistivity maximum to higher temperatures. The Neel temperature decreases with increasing pressure, while the ons et of the superconducting state is almost invariant with pressure up t o 6.5 GPa. At higher pressures a decrease of T-c has been observed.