Infrared dielectric response of relaxor ferroelectrics

Autor:	Jiří Hlinka, D. Noujni, Tetyana Ostapchuk, Jan Petzelt, Stanislav Kamba
Rok vydání:	2006
Předmět:	Materials science Condensed matter physics Infrared Analytical chemistry Infrared spectroscopy Soft modes Dielectric response Symmetry (physics) Condensed Matter::Materials Science Two-dimensional infrared spectroscopy Polar General Materials Science Instrumentation Nanoscopic scale
Zdroj:	Phase Transitions. 79:41-78
ISSN:	1029-0338 0141-1594
Popis:	In the article we discuss the dielectric response of relaxor-type complex perovskites in the phonon-frequency region on the basis of a rich collection of experimental data accumulated in our laboratory by numerous infrared spectroscopy investigations over the past decade. The effect of the cation occupational disorder and of the nanoscopic inhomogeneous polarisation on the infrared response is considered in the framework of the factor-group symmetry analysis and the effective-medium approach. Polar mode assignment and comparison of the mode parameters of different materials is facilitated by systematic evaluation of mode-plasma frequencies. Whenever possible, the results are presented in form of tables convenient for further analysis or by comparison with results of other techniques, including ab-initio calculations. Infrared properties of other non-perovskite relaxors are briefly mentioned.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::81f6acf77f9c8f3637101f79bd6bd1bd https://doi.org/10.1080/01411590500476438 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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