Proportion of frozen local polarization in relaxor ferroelectrics
arXiv:cond-mat/0103001 · doi:10.1088/0953-8984/13/5/326
Abstract
A Landau-type phenomenological cluster theory was presented to model the freezing process of local polarization in relaxors. Based on the theory, the proportion of frozen polarization in Pb(Mg$_{1/3}$Nb$_{2/3}$)O$_3$-PbTiO$_3$ (PMNT) was calculated from the experiment of dielectric nonlinearity. The local polarization was shown to freeze continuously in a cooling process. The amount of frozen polarization increases with increasing the measuring frequency.
10 pages, 3 figures