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Lattice dynamics and negative search for pyroelectricity in Sr.sub.(1-1.5x)./sub.La.sub.x./sub.TiO.sub.3./sub. ceramics
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SYSNO ASEP 0029718 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Ostatní články Title Lattice dynamics and negative search for pyroelectricity in Sr(1-1.5x)LaxTiO3 ceramics Title Dynamika mřížky a negatívní výsledek pátrání po pyroelektřině v keramice Sr(1-1.5x)LaxTiO3./sub Author(s) Almeida, A. (PT)
Chaves, M. R. (PT)
Gregora, Ivan (FZU-D) RID, ORCID
Muga, N.J. (PT)
Vilarinho, P. M. (PT)
Kholkin, A. L. (PT)
Costa, A.M. (PT)Source Title Ferroelectrics. - : Taylor & Francis - ISSN 0015-0193
Roč. 318, - (2005), s. 147-153Number of pages 7 s. Language eng - English Country GB - United Kingdom Keywords quantum paraelectricity ; Raman spectra ; pyroelectric current ; relaxors Subject RIV BL - Plasma and Gas Discharge Physics CEZ AV0Z10100520 - FZU-D (2005-2011) Annotation Lattice dynamics and polar properties in lanthanum doped SrTiO3(STO) ceramics, with general formulae Sr(1-1.5x)LaxTiO3 were studied in the temperature range between 10 K and eoom temperature. Despite the simularities of the low frequency Raman spectra, for differently (x=0.0533, 0.080 and 0.133) La-doped ceramics, and the spectra of the undoped ceramics, the TO1 polar soft mode could not be detected in those systems, which confirmes the non-existence of a ferroelectric phase at low temperature Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2006
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