TIME DECAY OF REMANENT POLARIZATION IN DEUTERON GLASS RB1-X(ND4)(X)D2ASO4

The polarization of deuteron glass Rb1-x(ND4)(x)D2AsO4 With x = 0.3 ha s been measured as a function of temperature and time. Remanent polari zation was observed when a bias field was applied on the deuteron glas s from high temperature and switched off below the freezing temperatur e. At law temperature, the slow relaxation of the remanent polarizatio n has a stretched exponential time dependence. With increase in temper ature, it deviates from the stretched exponential curve and shows cros sover behavior to a simple power law decay. The time relaxation in deu teron glass is found to depend also on the waiting time in the field c ooled and zero field cooled state. The experimental results are discus sed in terms of dynamic properties of other glass systems.