Experimental studies of the influence of defects and impurities on structural phase transitions

Abstract
A review of experiments pertaining to the influence of defects and impurities on structural phase transitions is given. The systems covered are the KH2P04-family, the TGS-family, the SrTiO3-family and, finally, the K1-x(Li, Na) x TaO3-system. Emphasis is placed on the influences of impurities and defects on static and dynamic critical and precritical effects, as well as their ability to induce glass-like precursor effects.