Field effect on aging and relaxation of the thermoremanent magnetization in spin glasses (low-field regime)

The time decay of the thermoremanent magnetization (TRM) was measured for the insulating spin-glass compound CdIn0.3Cr1.7S4 for different applied fields in a range where the TRM at time t=0 remains linear. The same scaling analysis of the aging effects which perfectly accounted for the very low-field results has also been successfully applied in this case. Constant age relaxation curves have been derived at 0.72 Tg and 0.84 Tg. They are fitted to a function of the form of a power law multiplied by a stretched exponential, and the field dependence of the parameters has been determined.