Investigation of Dielectric Relaxation Processes in Ba2NdFeNb4-xTaxO15Ceramics
| Autor: | J. Banys, D. Gabrielaitis, Marjorie Albino, Edita Palaimiene, Robertas Grigalaitis, Martynas Kinka, Michaël Josse, Mario Maglione |
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| Přispěvatelé: | Faculty of Physics [Vilnius], Vilnius University [Vilnius], Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut Polytechnique de Bordeaux-Université de Bordeaux (UB) |
| Rok vydání: | 2015 |
| Předmět: |
ferroelec trics
Materials science Condensed matter physics chemistry.chemical_element [CHIM.MATE]Chemical Sciences/Material chemistry Dielectric dielectric relaxation Tungsten Condensed Matter Physics Ferroelectricity Electronic Optical and Magnetic Materials Tetragonal crystal system chemistry visual_art visual_art.visual_art_medium Relaxation (physics) Ceramic Dispersion (chemistry) ferroelectric relaxor broadband dielectric spectrosopy Tetragonal tungsten bronze Solid solution |
| Zdroj: | Ferroelectrics Ferroelectrics, Taylor & Francis: STM, Behavioural Science and Public Health Titles, 2015, 485 (1), pp.101-109. ⟨10.1080/00150193.2015.1061348⟩ |
| ISSN: | 1563-5112 0015-0193 |
| Popis: | International audience; Dielectric response of Ba2NdFeNb4-xTaxO15 (x = 0.3, 0.6 and 2) solid solutions with Tetragonal Tungsten Bronze structure has been investigated by means of broadband dielectric spectroscopy in the frequency range from 20 Hz to 37 GHz. Pure Ba2NdFeNb4O15 compound displays ferroelectric behavior. Substitution of Nb5+ by Ta5+ considerably alters dielectric response of this system. Ferroelectric state was observed only for x = 0.3 compound with slightly lowered ferroelectric phase transition temperature. Further increase of x causes formation of relaxor state in these solid solutions and considerably lowers corresponding dielectric permittivity dispersion temperature region. |
| Databáze: | OpenAIRE |
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