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Comparative Dielectric Behavior of PBFe1/2Ta1/2O3 and NaNbO3:Gd Relaxor-Like Crystals



I P. Raevski, S A. Prosandeev, U Waghmare, V V. Eremkin, V G. Smotrakov, V A. Shuvaeva


Experimental data obtained for PBFe1/2Ta1/203 (PFT) and NaNbO3:Gd (NaNbGd) single crystals show a diffused dielectric permittivity peak that is inherent to relaxor ferroelectrics. However some deviations from the normal relaxor properties were also observed and are under discussion. One of the key features of the relaxors is the existence of the Burns temperature, at which the polar regions appear. We found out that PFT shows this feature but the NaNbGd dielectric behavior is different. We analyze these properties within a phenomenological theory and propose a microscopic model.
Journal of Physics C-Solid State Physics


dielectric permittivity, ferroelectrics, heterogeneous materials, perovskites, phase transitions, relaxors


Raevski, I. , Prosandeev, S. , Waghmare, U. , Eremkin, V. , Smotrakov, V. and Shuvaeva, V. (2021), Comparative Dielectric Behavior of PBFe<sub>1/2</sub>Ta<sub>1/2</sub>O<sub>3</sub> and NaNbO<sub>3</sub>:Gd Relaxor-Like Crystals, Journal of Physics C-Solid State Physics (Accessed April 16, 2024)
Created October 12, 2021