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Phonon anomalies in Pb.sub.1-x./sub.La.sub.x./sub.(Zr.sub.0.9./sub.Ti.sub.0.1./sub.)O.sub.3./sub. ceramics
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SYSNO ASEP 0322299 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Phonon anomalies in Pb1-xLax(Zr0.9Ti0.1)O3 ceramics Title Fononové anomálii v keramikách Pb1-xLax(Zr0.9Ti0.1)O3. Author(s) Buixaderas, Elena (FZU-D) RID, ORCID
Gregora, Ivan (FZU-D) RID, ORCID
Kamba, Stanislav (FZU-D) RID, ORCID, SAI
Kužel, Petr (FZU-D) RID, ORCID, SAI
Reaney, I. (GB)Source Title Applied Physics Letters. - : AIP Publishing - ISSN 0003-6951
Roč. 94, č. 5 (2009), 052903/1-052903/3Number of pages 3 s. Language eng - English Country US - United States Keywords phonons ; Infrared and Raman spectra ; ferroelectric phase transitions Subject RIV BM - Solid Matter Physics ; Magnetism R&D Projects IAA100100701 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) KAN301370701 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) GA202/09/0682 GA ČR - Czech Science Foundation (CSF) GA202/06/0403 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z10100520 - FZU-D (2005-2011) UT WOS 000263167000044 DOI 10.1063/1.3077019 Annotation The lattice dynamics of Pb1-xLax(Zr0.9Ti0.1)O3 (PLZT X/90/10) with X=0, 2, 4, 10% of La was studied by means of Far Infrared, Raman and terahertz spectroscopies in the temperature range of 20–800 K. Infrared active soft phonons with anomalies near the paraelectric-ferroelectric phase transition were found for all the samples. Some Raman active phonons show anomalies ~200 K below Tc, due to another phase transition to a ferroelectric state with doubled unit cell. Samples with higher La content (X=4,10) display nonclassical phonon softening described by ω2=a(T−Tc)γ with γ=2/3. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2009
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