Abstract
The temperature dependences of the complex permittivity of ferroelectric PbFe1/2Nb1/2O3 have been studied at frequencies of 25, 500, and 104 Hz. It has been found that the phase transition is smeared in the temperature range ∼90 K. In the smearing region, there is a deviation from the Curie-Weiss law, which begins to be obeyed only above the Burns temperature. The temperature dependence of the local order parameter has been constructed, which indicates that the polarization in PbFe1/2Nb1/2O3 occurs at the Burns temperature.
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Original Russian Text © S.A. Gridnev, A.A. Kamynin, 2012, published in Fizika Tverdogo Tela, 2012, Vol. 54, No. 5, pp. 956–958.
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Gridnev, S.A., Kamynin, A.A. Specific features of the polarization in the PbFe1/2Nb1/2O3 ferroelectric. Phys. Solid State 54, 1018–1020 (2012). https://doi.org/10.1134/S1063783412050137
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DOI: https://doi.org/10.1134/S1063783412050137