Relaxation processes in glasses of the Ge-As-S system

The internal friction in Ge x As40 − x S60 glasses is investigated in the temperature range 100 K-T g at infralow frequencies (10−3−10−1 Hz). It is shown that the concentration dependence of the internal friction of these materials changes as a result of the transformation of the dominant kinetic unit in dissipative processes of the relaxation and nonrelaxation types. It is established tha the change in the mechanism of internal friction in the Ge x As40 − x S60 glasses leads to a jump in the activation energy of the α relaxation and to a local minimum in the frequency factor τ0.