Thermal expansion and polarization of (1-x)PNN-xPT solid solutions

Gorev, M. V.; Flerov, I. N.; Bormanis, K.; Kalvane, A. Source: INTEGRATED FERROELECTRICS, 196 (1):60-63; SI 10.1080/10584587.2019.1591957 FEB 12 2019

The paper presents the results of detailed studies of the thermal expansion of (1-x)PbNi1/3Nb2/3O3-xPbTiO3 solid solutions with x = 0-0.8. The anomalous and lattice contributions to deformation and the thermal expansion coefficient are analyzed and the mean square polarization Pd is determined. The results obtained are discussed within the framework of the thermodynamic theory and the Landau 2-4-6 coefficients for solid solutions are estimated.