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A new phase transition in sodium niobate

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Abstract

The temperature dependences of the dielectric constant ε of sodium niobate single crystals NaNbO3 and sodium niobate-based (Na,Li)NbO3 and (Na,K)NbO3 solid solutions with low content of the second component have been studied. A weak anomaly observed in ε(T) indicates a new phase transition in the vicinity of 150°C in NaNbO3. The introduction of lithium or potassium into NaNbO3 crystals increases the temperature of this transition. The X-ray powder diffraction data suggest that the new transition takes place between two rhombohedral phases.

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Authors and Affiliations

  1. Research Institute of Physics, Rostov State University, Rostov-on-Don, 344090, Russia

    I. P. Raevskii, L. A. Reznichenko, V. G. Smotrakov, V. V. Eremkin, M. A. Malitskaya, E. M. Kuznetsova & L. A. Shilkina

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  1. I. P. Raevskii
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  2. L. A. Reznichenko
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  3. V. G. Smotrakov
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  4. V. V. Eremkin
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  5. M. A. Malitskaya
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  6. E. M. Kuznetsova
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  7. L. A. Shilkina
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Translated from Pis’ma v Zhurnal Tekhnichesko\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \) Fiziki, Vol. 26, No. 16, 2000, pp. 97–102.

Original Russian Text Copyright © 2000 by Raevski

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Raevskii, I.P., Reznichenko, L.A., Smotrakov, V.G. et al. A new phase transition in sodium niobate. Tech. Phys. Lett. 26, 744–746 (2000). https://doi.org/10.1134/1.1307831

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  • DOI: https://doi.org/10.1134/1.1307831

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