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Hyper-Raman scattering: new prospects for the description of the local structure of complex perovskites
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SYSNO ASEP 0364638 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Hyper-Raman scattering: new prospects for the description of the local structure of complex perovskites Author(s) Al-Zein, A. (FR)
Hlinka, Jiří (FZU-D) RID, ORCID
Rouquette, J. (FR)
Kania, A. (PL)
Hehlen, B. (FR)Source Title Journal of Applied Physics. - : AIP Publishing - ISSN 0021-8979
Roč. 109, č. 12 (2011), 124114/1-124114/5Number of pages 5 s. Language eng - English Country US - United States Keywords hyper-Raman scattering ; PMN ; relaxor ; ferroelectric phase transition Subject RIV BM - Solid Matter Physics ; Magnetism R&D Projects GAP204/10/0616 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z10100520 - FZU-D (2005-2011) UT WOS 000292331200111 DOI 10.1063/1.3599863 Annotation Hyper-Raman scattering is used to investigate the vibrations in two prototypical relaxors, PbMg1/3Nb2/3O3 and PbMg1/3Ta2/3O3 (PMT). First-order scattering from polar modes is clearly observed. Most of the triply-degenerate cubic vibrations are split into doublets and their frequencies compare very well to that of PbTiO3 in its tetragonal phase. Their shape and scattering intensities are sensitive to the local chemical ordering and ferroelectric distortions. For example, the tendency toward 1:1 local ordering on the β-site in PMT is clearly evidenced. These results demonstrate the strong potentiality of hyper-Raman scattering as structural probe of complex perovskites. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2012
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