Evidence of both unusual dielectric mode at low frequencies and the co-existence of antiferroelectric, ferroelectric and paraelectric phases in a novel antiferroelectric liquid crystals mixture
| Autor: | Caterina Maria Tone, Andreea Ionescu, Magdalena Zurowska, L. Marino, Michał Czerwiński |
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| Rok vydání: | 2017 |
| Předmět: |
Materials science
Condensed matter physics Physics::Optics 02 engineering and technology Dielectric 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Ferroelectricity Atomic and Molecular Physics and Optics 0104 chemical sciences Electronic Optical and Magnetic Materials Dielectric spectroscopy Condensed Matter::Materials Science Liquid crystal Phase (matter) Materials Chemistry Relaxation (physics) Antiferroelectricity Physical and Theoretical Chemistry 0210 nano-technology Spectroscopy Cole–Cole equation |
| Zdroj: | Journal of Molecular Liquids. 247:43-56 |
| ISSN: | 0167-7322 |
| DOI: | 10.1016/j.molliq.2017.09.055 |
| Popis: | The dynamics of different collective and non-collective relaxation processes were investigated in a new mixture which displays ferroelectric and antiferroelectric properties by dielectric spectroscopy. The experimental data, collected in function of frequency, temperature and under bias filed, were analyzed using a generalized Havriliak-Negami expression, leading to many dielectric relaxation modes. The results obtained through the dielectric spectroscopy and optical microscopy suggest a coexistence of different phases and hereditary dielectric peaks. A deep penetration of the Goldstone mode also occurs during isotropic phase. |
| Databáze: | OpenAIRE |
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