| Autor: |
Wai-Hung Chan, Jiwei Zhai, Eugene V. Colla, Zheng Kui Xu, Haydn Chen |
| Rok vydání: |
2003 |
| Předmět: |
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| Zdroj: |
AIP Conference Proceedings. |
| ISSN: |
0094-243X |
| DOI: |
10.1063/1.1609932 |
| Popis: |
Two complex perovskite antiferroelectric (AFE) systems were studied; they are Pb0.97La0.02(Zr0.6Sn0.3Ti0.1)O3 (PLZST) in ceramic form and Pb0.99Nb0.02(Zr0.82Sn0.12Ti0.04)0.98O3 (PNZST) in thin film form. Dielectric and transmission electron microscopy (TEM) studies of the PLZST ceramics confirmed the AFE nature of the specimen, but at low temperature the electrical field application could induce a temporary ferroelectric (FE) phase with characteristic life‐time dependent on temperature This life‐time reaches a value of ∼ 0.1s at 248K. Further decrease of temperature leads to a much faster than Arrhenius growth of the recovery time, which eventually exceeds the reasonable laboratory time scale below 210K. We believe that the strongly temperature‐dependent kinetics arises from a cooperative freezing of the incommensurate AFE order in the presence of quenched composition disorder. The PNZST films’ polarization properties are highly dependent on the film thickness and at the lowest studied limit (∼170 nm) the... |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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