Slow polarization processes in relaxor ferroelectrics
| Autor: | V. A. Kirikov, V. V. Gladkii, T. R. Volk |
|---|---|
| Rok vydání: | 2002 |
| Předmět: |
Materials science
Solid-state physics Condensed matter physics Lead magnesium niobate Condensed Matter Physics Polarization (waves) Spectral line Electronic Optical and Magnetic Materials Condensed Matter::Materials Science Nuclear magnetic resonance Electric field Charge carrier Relaxor ferroelectric Solid solution |
| Zdroj: | Physics of the Solid State. 44:365-372 |
| ISSN: | 1090-6460 1063-7834 |
| Popis: | The general features of the slow polarization kinetics in relaxor ferroelectrics, observed and studied by us in the specific example of crystals of barium-strontium niobate (SBN) solid solutions of various compositions and of lead magnesium niobate (PMN), are considered. The dielectric hysteresis loops and spectra of the polarization relaxation time distribution in quasi-static and static electric fields were found to reveal characteristic anomalies related to a random internal electric field in the bulk of a relaxor ferroelectric. Such a field caused by structural disorder accounts for the anomalously broad spectrum of potential barriers for domain walls. The part played by free charge carriers in the formation of giant barriers is demonstrated. The paper presents some quantitative data characterizing the specific features of the structure and physical properties of the relaxors. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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