A compendium ofTc-UsandPs-Δzdata for displacive ferroelectrics

An attempt has been made to relate transition temperature (Tc ) with spontaneous polarization (Ps ) for ‘Twenty Two’ displacive ferroelectrics belonging to different families. A possible Ps -Δz relation is predicted on the basis of our previously reported Tc -Δz relationship. It exhibits a fairly good agreement between experimental and theoretical results. A new classification of ferroelectrics has been proposed wherein the concept of ‘strong’ and ‘weak’ ferroelectrics is introduced.