Investigation of dielectric after-effects in poly- and single crystalline BaTiO3 |
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Authors: | F Walz H J Blythe |
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Institution: | (1) Institut für Physik, Max-Planck-Institut für Metallforschung, D-7000 Stuttgart, Fed. Rep. Germany;(2) Department of Physics, University of Sheffield, England |
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Abstract: | Dielectric relaxation occurring in single- and polycrystalline BaTiO3, following different polarization treatments of the specimens has been investigated in the temperature range 10 K<T<450 K. The observed relaxation phenomena are discussed in terms of polarization induced growth of extra-domains which, via corresponding enhancement of the total domain wall area, may account for the time dependence of the dielectric constant. On the basis of this relaxation model the activation parameters of the different processes are determined and discussed in terms of variations of the wall mobility within the different crystallographic phases occurring in BaTiO3. |
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Keywords: | 77 |
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