Coupled spherical pseudospin-phonon model and the pressure-temperature phase diagram of relaxor ferroelectrics - art. no. 132103

摘要

A coupled spherical random bond-random field pseudospin-phonon model is presented, which explains the effects of pressure on the relative stability of the ferroelectric, relaxor-, and paraelectriclike phases and thus the temperature-pressure phase diagram of relaxor systems. Within this model we derived an expression for the dynamic susceptibility of relaxors, which describes the pressure and temperature dependence of the peak in the dynamic dielectric permittivity. [References: 26]