Low-temperature magnetic properties of the TbPd and TbPd3 compounds

Field dependences of the magnetization M(H) for the TbPd and TbPd3 compounds were measured at 4.2-70 K in magnetic fields up to 120 kOe. For both samples, no saturation is reached in the magnetic fields. At 4.2 K, the field dependence of the magnetization of TbPd is characterized by a slight hysteresis and two anomalies observed at 15 and 60 kOe, which can be related to field-induced spin-reorientation transitions. As the temperature increases, both anomalies (low- and high-field) smooth out progressively and disappear at 10 and 40 K, respectively. The temperatures of the magnetic order-disorder transition for TbPd and TbPd3 were determined using a Belov-Arrotte procedure as well as from measured temperature dependences of the magnetic susceptibility (for TbPd) and heat capacity (for TbPd3); they were found to be equal to ∼50 and ∼9 K, respectively