Fizika Tverdogo Tela, 2025 Volume 67, Issue 5,Pages 866–872(Mi ftt11502)
Ferroelectricity
Effect of PbZr$_{0.53}$Ti$_{0.47}$O$_3$ concentration on the degree of phase transition diffuseness and depolarization temperature in transparent ceramics Pb(Mg$_{1/3}$Nb$_{2/3}$)O$_3$–$x$PbZr$_{0.53}$Ti$_{0.47}$O$_3$
Abstract:
The effect of the PZT component content $(x)$ on the degree of phase transition diffuseness, as well as on the relative position of the depolarization temperature $(T_d)$ and the morphotropic phase transition $(T_{F-R})$ was studied in transparent ceramics Pb(Mg$_{1/3}$Nb$_{2/3}$)O$_3$–$x$PbZr$_{0.53}$Ti$_{0.47}$O$_3$ (PMN-$x$PZT) ($x$ = 10, 16, 23, 33%). Dielectric, optical and pyroelectric measurements were carried out for this purpose. It was shown that all the studied ceramics are relaxors, and in the compositions with $x$ = 23.33% a spontaneous first-order ferroelectric phase transition is observed in the absence of an electric field. It was found that in all compositions a single-stage transition of the polarized sample to the relaxor phase occurs, i.e. the temperatures $T_d$ and $T_{F-R}$ coincide. The obtained results are discussed in terms of the degree of phase transition diffuseness and the sizes of the polar regions.
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