Observation of Periodic Spinodal Decomposition

Abstract
Periodic spinodal decomposition has been observed in a critical binary mixture of isobutyric acid and water. As predicted by Onuki, phase separation can be dramatically slowed down by a periodic quench of appropriately chosen mean value and amplitude of the temperature variations. Depending on details of the quench conditions, two steady-state conditions can be achieved, in one of which the system has completely separated.