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Dielectric properties of perovskite ceramics of (1–x)BiFeO3 − x(KBi)1/2TiO3 (0.40 < x < 0.85) solid solutions from impedance spectroscopy data

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Abstract

The dielectric properties of the ceramics of (1 − x)BiFeO3 − x(KBi)1/2TiO3 (0.40 < x < 0.85) solid solutions with an orthorhombic structure have been studied using impedance spectroscopy in the frequency range 25–106 Hz at different temperatures. It has been shown that these solid solutions undergo a diffuse ferroelectric phase transition. The Curie temperature is found to be in the range 620–640 K. The activation energies of dielectric polarization relaxation (δE M ) and dc charge carriers (ΔE dc) are determined. It has been established that, in the vicinity of 460 K, ΔE dc increases jumpwise as the temperature increases.

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Authors and Affiliations

  1. Scientific-Practical Materials Research Centre, National Academy of Sciences of Belarus, ul. P. Brovki 19, Minsk, 220072, Belarus

    A. V. Pushkarev, N. M. Olekhnovich & Yu. V. Radyush

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  1. A. V. Pushkarev
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  2. N. M. Olekhnovich
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  3. Yu. V. Radyush
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Correspondence to A. V. Pushkarev.

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Original Russian Text © A.V. Pushkarev, N.M. Olekhnovich, Yu.V. Radyush, 2011, published in Fizika Tverdogo Tela, 2011, Vol. 53, No. 3, pp. 489–492.

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Pushkarev, A.V., Olekhnovich, N.M. & Radyush, Y.V. Dielectric properties of perovskite ceramics of (1–x)BiFeO3 − x(KBi)1/2TiO3 (0.40 < x < 0.85) solid solutions from impedance spectroscopy data. Phys. Solid State 53, 522–526 (2011). https://doi.org/10.1134/S1063783411030267

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  • DOI: https://doi.org/10.1134/S1063783411030267

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