Abstract:
The specific heat of single-crystal U Pd2 Si2 has been studied using both the step heating
and continious heating methods for the temperature range 2 to 250 K. Successive phase
transitions at Tl = 136I< and T2 = 108I< are reported, which are consistent with current
publications. The transition at 40K, which was previously reported, has not been
detected. Recent published elastic neutron scattering data, magnetic susceptibility and
resistivity results suggest that U Pd2 Si2 may be a heavy fermion compound, however,
the electronic specific heat coefficient I (= 18.97 ;~), obtained from the specific heat
Cv measurements, is smaller than that of the conventional heavy fermion system. The
Debye temperature of U Pd2Si2 is found to be 116.55K. The possibility is discussed that
the maximum in CIT in the low-temperature range 2 to 4K corresponds to Schottky
anomaly induced by localized magnetic impurities .
