Nonequilibrium dynamics in a three-dimensional spin glass

Abstract

Nonequilibrium dynamics in a Ag(11%Mn) spin glass has been studied by low frequency ac-susceptibility and magnetic relaxation experiments. The results unequivocally show that spin structures that memorize the cooling process are imprinted in the system. These imprinted structures disclose themselves through dramatic changes of the dynamics on reheating the spin glass through the temperatures where intermittent halts or changes of the cooling rate have been imposed. We can qualitatively interpret our results in terms of a real space picture based upon spin-glass domains, droplet excitations and chaos.