Dielectric tunability and imprint effect in Pb(Mg1/3Nb2/3)O3-PbTiO3 ceramics
| Autor: | Chude Feng, Lidong Chen, Shiming Huang, Xiaowei Wen |
|---|---|
| Rok vydání: | 2007 |
| Předmět: |
Materials science
Condensed matter physics Process Chemistry and Technology Physics::Optics Mineralogy Dielectric Ferroelectricity Surfaces Coatings and Films Electronic Optical and Magnetic Materials Condensed Matter::Materials Science Hysteresis Polarization density visual_art Electric field Materials Chemistry Ceramics and Composites visual_art.visual_art_medium Ceramic Electroceramics DC bias |
| Zdroj: | Ceramics International. 33:815-819 |
| ISSN: | 0272-8842 |
| DOI: | 10.1016/j.ceramint.2006.01.008 |
| Popis: | For (1 − x )Pb(Mg 1/3 Nb 2/3 )O 3 - x PbTiO 3 , composition dependence of dielectric tunability under the dc bias field and dielectric hysteresis during the circle of external electric field were studied. The highest dielectric tunability of 71% (at the dc bias of 1000 V/mm) and the lowest dielectric hysteresis were observed in the 0.9PMN-0.1PT sample. The effect of circled electric field on the dielectric hysteresis was more remarkable than that on the dielectric aging. Moreover, the effect of the filed-cooled process on the ferroelectric properties was also investigated. In the polycrystalline 0.7PMN-0.3PT sample cooled under a strong dc electric field, a remarkable imprint effect was reported. The preferred direction induced by a strong external electric field was partially reserved after removing the electric field. This imprint effect and the dielectric hysteresis have been tentatively interpreted by reorientation and alignment of polar vectors. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect