Abstract
Single-phase ceramic samples with the perovskite structure [(Na0.5Bi0.5)1 – xKx] TiO3 (x = 0, 0.01, 0.02, 0.03, 0.04, 0.05, 0.06) are prepared by the method of solid-state synthesis and their structure, microstructure and dielectric and ferroelectric properties are studied. An increase in the unit-cell parameters of the perovskite lattice as a result of an increase in the K-cation content in accordance with the ratio of the radii of cations in the A sublattice of the perovskite structure is proved. The method of second-harmonic generation confirms that the introduction of potassium cations in the A positions of the perovskite lattice promotes enhancement of the ferroelectric properties of the studied samples. Dielectric-relaxation effects are revealed, which indicate the presence of vacancies in the oxygen sublattice.
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Funding
This work was supported by a subsidy allocated by the Federal Research Center for Physics and Physics of the Khabarovsk Branch of the Russian Academy of Sciences for the fulfillment of the state task on topic No. 45.22 “Fundamentals of creating a new generation of nanostructured systems with unique operational electrical and magnetic properties” (AAAA-A18-118012390045-2).
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Kaleva, G.M., Politova, E.D., Mosunov, A.V. et al. Synthesis, Microstructure, Dielectric and Ferroelectric Properties of (Na,Bi,K)TiO3 Ceramics. J. Surf. Investig. 14, 663–667 (2020). https://doi.org/10.1134/S1027451020040102
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DOI: https://doi.org/10.1134/S1027451020040102