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Abstract
Temperature dependences of the dielectric permittivity and thermal treatment effect have been studied for (1−x)SrTiO3-(x)KTaO3 and (1−x)SrTiO3-(x)KNbO3 (0 ≤ x ≤ 0.2) solid solutions. For low concentrations x, strong dielectric relaxation was found in the temperature range of 150–250 K. A relaxing centers model based on the local charge compensation of heterovalent impurities is discussed.
Acknowledgments
We would like to thank P. P. Syrnikov, and T. A. Shaplygina for samples preparation, N. V. Zaitseva for assistance with X-ray diffraction analysis of the samples and O. E. Kvyatkovskii and V. K. Yarmarkin for fruitful discussions.
Additional information
Funding
This research was supported in part by the Fundamental Research Programs of the Russian Academy of Sciences and Grant P108/12/1941 of the Czech Republic.