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Recently, a hybrid magnet system was constructed at the National Research Institute for Metals (NRIM) and a maximum field of up to 36.5 T became possible to generate for 30 mm bore and that of 32.2 T for 50 mm bore. The magnetization measurement is one of the most crucial experimental methods for investigating the magnetic properties of various substances in a high-magnetic field. Very recently, a reliable and efficient magnetometer was developed by means of the sample-extraction method for the hybrid magnet. A magnetization process for various magnetic substances has been measured up to 30 T so far. In this report, the authors introduce the home-made magnetometer and recent results obtained by using it. The hexagonal intermetallic compound RPd2Al3 (R = light rare earth element) has the PrNi2Al3-type structure which consists of R-Pd layers and pure Al layers alternating along the c-axis. The magnetic properties in these systems hold interest in relation to the heavy fermion superconductor UPd2Al3 (TC = 2 K), which shows planar antiferromagnetic ordering below 14 K. A systematic study of magnetic properties should lead to the understanding of the fundamental interactions of RPd2Al3 compounds including the heavy fermion superconductor UPd2Al3. Single crystals of RPd2Al3 (R = Ce, Pr and Nd) were grown with the Czochralsky pulling method using a tetra-arc furnace in pure Ar atmosphere. In PrPd2Al3 the magnetization curves are well reproduced by the calculated ones. On the other hand, for CePd2Al3 and NdPd2Al3 the amplitudes of the magnetization are smaller than calculated ones. These differences are caused by the Kondo effect (CePd2Al3) and by antiferromagnetic exchange interactions (NdPd2Al3). For a quantitatively more precise description, effects of magnetic interactions must be included in the calculation.