Polarization and depolarization of relaxor ferroelectric strontium barium niobate |
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Authors: | V. V. Gladkii V. A. Kirikov S. V. Nekhlyudov T. R. Volk L. I. Ivleva |
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Affiliation: | (1) Shubnikov Institute of Crystallography, Russian Academy of Sciences, Leninskii pr. 59, Moscow, 117333, Russia;(2) Institute of General Physics, Russian Academy of Sciences, ul. Vavilova 38, Moscow, 117942, Russia |
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Abstract: | The anomalies of polarization (mismatch of hysteresis loops for several first repolarization cycles, the absence of specific coercive field, etc.) in quasi-static and dc electric fields have been found in the strontium barium niobate relaxor ferroelectric. The anomalies are associated with a highly inhomogeneous structure of the crystal, which is considered a clearly defined nonergodic system with a random distribution of strong local internal fields. The energy distributions of potential barriers for the polarization and the depolarization are obtained at different electric field strengths and temperatures. |
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