Dielectric Properties of PMN-PNN+2%Li2O Ferroelectric Ceramics at Low and Infra-Low Frequencies
| Autor: | Anna Kalvane, A. I. Burkhanov, K. Bormanis, I. E. Tumanov |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
Phase transition
Materials science Condensed matter physics Field (physics) Ferroelectric ceramics Physics::Optics chemistry.chemical_element Dielectric Condensed Matter Physics Polarization (waves) Electronic Optical and Magnetic Materials Condensed Matter::Materials Science chemistry visual_art visual_art.visual_art_medium Polar Lithium Ceramic |
| Zdroj: | Ferroelectrics. 469:85-91 |
| ISSN: | 1563-5112 0015-0193 |
| DOI: | 10.1080/00150193.2014.948788 |
| Popis: | A study of dielectric response to weak and strong measuring fields at temperatures of the diffuse phase transition in lead-magnesium niobate—lead-nickel niobate (PMN-PNN) containing an admixture of lithium is reported. A relaxor behaviour of the ceramic compound manifesting itself by a substantial shift of the temperature of dielectric permittivity maximum with field intensity and frequency is detected. Specific features of the dielectric nonlinearity observed at temperatures considerably higher than the temperature of the low-frequency dielectric permittivity maximum are related to extension of the range of phase transition to higher temperatures. This extension is related to formation of nano-size polar clusters within the region of the diffuse phase transition, the cluster formation being substantially affected by the applied field. |
| Databáze: | OpenAIRE |
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