Reversible permittivity of multicomponent PMN-PT-based ceramics |
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Authors: | M V Talanov A V Turik L A Reznichenko |
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Institution: | 1. Research Institute of Physics, Southern Federal University, pr. Stachki 194, Rostov-on-Don, 344090, Russia
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Abstract: | The reversible permittivity of Ba-doped ceramics of the multicomponent system mPMN-nPNN-yPZN-xPT (m = 0.1298–0.4844, n = 0.1266–0.4326, y = 0.0842–0.130, x = 0.25–0.40) is studied. The reversible permittivities of cubic, heterophase, and tetragonal ceramics are analyzed under various experimental conditions, such as the measuring ac electric field frequency and the time of residence in a dc bias electric field. The transformation of permittivity minima into a plateau and the subsequent disappearance of all anomalies as the lead titanate concentration decreases are assumed to be related to a change in the initial domain structure of the material. A diagram illustrating the dependence of the tunability coefficient on the lead titanate concentration is plotted, and the ceramic compositions that correspond to the characteristic dependences of reversible permittivity are determined. |
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