Random field transition of a binary liquid in a porous medium.
01 January 1987
We have used quasielastic light scattering to study a binary liquid critical mixture in a porous medium which undergoes a random field transition upon warming to a history dependent frozen domain state. Finite size effects and a crossover to activated dynamics with non-exponential relaxations are observed. The relaxation time is found to increase very rapidly at the random field transition, in agreement with recent theories of activated dynamics in disordered systems.