Title: RELAXATION DYNAMICS OF DISORDERED ISING-LIKE MODELS
Authors: R.R.Levitskii, R.O.Sokolovskii (Institute for Condensed Matter Physics of the National Academy of Sciences of Ukraine, 1 Svientsitskii Str., 79011 Lviv, Ukraine)

Two-site cluster approximation to Glauber's master equation is developed for lattice spin systems with substitutional chaos. Dynamic pair correlation functions of disordered Ising and Mitsui models are calculated. The agreement between the theory and the results of dielectric measurements in ferroelectric crystals Cs(H$_{1-x}$D$_x$)$_2$PO$_4$, Rs$_{1-x}$dRs$_x$ is remarkably good.

Comments: Figs. 2, Refs. 16, Tabs. 0.