Temperature dependence of polarization reversal in (Nb, Co)-DOPED BaTiO₃ ceramics

Vasile Tura “Al. I. Cuza” University, Faculty of Physics, Dept. of Electricity and Magnetism, Iasi, 6600, Romania

Constantin Papusoi “Al. I. Cuza” University, Faculty of Physics, Dept. of Electricity and Magnetism, Iasi, 6600, Romania

Liliana Mitoseriu “Al. I. Cuza” University, Faculty of Physics, Dept. of Electricity and Magnetism, Iasi, 6600, Romania

Abstract

The switching properties of (Nb, Co)-doped BaTiO₃ ceramics were studied in the range of temperatures between 0° and 140°C. Experimental dependences of switching current density j(t) and electric displacement D(t) are compared to those predicted by the extended Avrami theory.^1–2 The effective dimension of nucleation is noninteger d∈(2,3), irrespective of the temperatures and amplitudes of field strength.

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Temperature dependence of polarization reversal in (Nb, Co)-DOPED BaTiO₃ ceramics

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Temperature dependence of polarization reversal in (Nb, Co)-DOPED BaTiO3 ceramics

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Temperature dependence of polarization reversal in (Nb, Co)-DOPED BaTiO₃ ceramics