VELOCITY OF SOUND AND RESISTIVITY MEASUREMENTS ON AMORPHOUS FECRB, FEMNB, AND FENIB DURING STRUCTURAL RELAXATION

The velocity of sound and the electrical resistivity of amorphous Fe75 Cr5B20, Fe75Mn5B20, and Fe75Ni5B20 are measured during isothermal heat treatments. It is shown that different types of measurements are inde ed necessary in order to reach sensible conclusions on relaxation mech anisms, since one measurement only is prone to multiple interpretation . Without reference to any specific model, the present study sheds som e light on the nature of the atomic rearrangements involved in the str uctural relaxation processes, combining the results of two experimenta l techniques and three related compositions.