Kinetics of pressure induced structural phase transitions - A review

The current status of experimental as well as theoretical advances in the u nderstanding of kinetics of structural phase transitions is reviewed. A bri ef outline of the classification of phase transitions and classical ideas i n the theory of kinetics of phase change is presented first. High pressure experimental techniques developed for studying the kinetics of structural t ransitions are reviewed and the salient features of each technique is broug ht out, The experimental technique using the diamond anvil cell (DAC) and i mage processing gets special mention as it promises to impart a new directi on to this field. The usefulness of kinetic parameters in understanding the mechanism of a phase transition is examined, Typical examples from the lit erature are provided to give a flavour for these kind of studies. In conclu sion, several open questions are raised which could pave way for future wor k in this area.