Open AccessPressure as a probe of the glassy state of ferroelectrics with random site disorder
Author(s) -
G A Samara,
L V Hansen
Publication year - 1998
Language(s) - English
Resource type - Reports
DOI - 10.2172/642800
Subject(s) - ferroelectricity , crossover , materials science , polar , condensed matter physics , dipole , relaxation (psychology) , soft modes , radius , chemical physics , chemistry , dielectric , physics , psychology , social psychology , computer security , optoelectronics , organic chemistry , astronomy , artificial intelligence , computer science
Results on lanthanum-modified lead zirconate-titanates (PLZTs) have revealed a pressure-induced crossover from a normal ferroelectric to a relaxor state and the continuous evolution of the dynamics and energetics of the relaxation process. This crossover appears to be a general feature of soft mode ferroelectrics with random site dipolar impurities or polar nanodomains and results from a large decrease in the correlation radius among polar nanodomains -- a unique property of soft mode ferroelectrics