[en] The aim of this work is to show the temperature variation of the electrical resistivity, the thermal conductivity and the thermopower in the temperature range from 4.2 K to room temperature of the series (Gdsub(x)Ysub(1-x))Al₂ (0<=x<=1). Additional other physical properties such as magnetisation, suszeptibility and lattice constants are studied in the thesis. In the present work the determination of magnetic scattering processes to thermal conductivity and thermopower is based on a method which has been developed for the electrical resistivity. The idea of this method is to compare the transport properties of magnetic and nonmagnetic isostructurel compounds. For the system under investigation YAl₂ serves as the nonmagnetical isostructurel 'basis'. The subject which has been studied in detail is the influence of spin disorder scattering processes, existing in the paramagnetic temperature range. The temperature dependence of the spin disorder scattering contribution to the electrical resistivity rhosub(spd), the thermal conductivity lambdasub(spd) and the thermopower Ssub(spd) obtained from the experimental result are compared to the theoretical calculations. These calculations are based on the linearised Boltzmann equation which has been solved using the relaxation time approximation. Both the theory and experiment show that rhosub(spd) is temperature independent, whereas lambdasub(spd) and Ssub(spd) are linear in temperature. (Author)