Abstract

We report on the simultaneous measurement of resistivity and Seebeck coefficients in samples of Pd81Ge19 ribbons prepared by the melt spinning technique method and having a typical dimension of 40.0 mm × 1.75 mm × 0.028 mm. The investigation was performed using a new completely automated device in a large temperature range (from room to 700°C). Structural changes, crystallization times and heat treatments on several samples of the same composition were followed as a function of temperature. Seebeck coefficients, reported for the first time in these samples, varied roughly between -2 and -21 µV/K in the temperature range of 25 to 700°C, while the electrical resistivity varied roughly between 35 and 120 µΩ.cm in agreement with the literature. Complementary differential scanning calorimetry (DSC) and scanning electron microscopy (SEM) experiments were also carried out and confirm the phase transitions observed by the above mentioned techniques.

Key words: Seebeck coefficient, melt spinning technique, crystallization temperature, electrical resistivity, phase transitions.