Abstract
Basic research in phase transitions has the momentum of a decade or more of significant accomplishment in problems ranging from fundamental theory and experiment to the application of many new exciting areas such as order-disorder in alloy design, martensitic transformations and critical phenomena. Infrared (IR), Raman (R) and inelastic neutron (N) spectroscopy have been shown to be powerful tools and much work has been carried out, especially in verification of the “soft mode” idea and to detail studies of “soft mode” behavior at displacive structural phase transitions. Excellent reviews on this topic have been given by Scott (1), Blinc and Zeks (2) and by Dorner and Comes (3).
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