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Terahertz and far infrared response of Ba.sub.x./sub.Sr.sub.1-x./sub.TiO.sub.3./sub. films
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SYSNO ASEP 0353071 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Terahertz and far infrared response of BaxSr1-xTiO3 films Author(s) Simon, Elizabeth (FZU-D)
Ostapchuk, Tetyana (FZU-D) RID, ORCID
Kužel, Petr (FZU-D) RID, ORCID, SAI
Hlinka, Jiří (FZU-D) RID, ORCID
Kamba, Stanislav (FZU-D) RID, ORCID, SAI
Nguema, E. (FR)
Mounaix, P. (FR)
Carru, J.C. (FR)
Velu, G. (FR)Source Title Phase Transitions. - : Taylor & Francis - ISSN 0141-1594
Roč. 83, 10-11 (2010), s. 966-973Number of pages 8 s. Language eng - English Country GB - United Kingdom Keywords thin films ; complex dielectric function ; time-domain terahertz spectroscopy ; infrared transmittance Subject RIV BM - Solid Matter Physics ; Magnetism R&D Projects GAP204/10/0616 GA ČR - Czech Science Foundation (CSF) ME08109 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) CEZ AV0Z10100520 - FZU-D (2005-2011) UT WOS 000284539500023 DOI 10.1080/01411594.2010.509608 Annotation Here we report on experimental study of terahertz and far infrared dielectric response of polycrystalline BaxSr1-x TiO3 (x = 0.5, 0.7 and 0.8) films of 0.3-1 µm thicknesses deposited on a sapphire. Terahertz and infrared transmission measurements were performed in 100-420 K temperature range covering the vicinity of TC of their bulk prototypes. We identified all polar optical phonons observed in bulk samples below 400 cm-1 of the same composition including soft and central mode and found some additional features, which we assigned to the depolarizing field effect coming from the structural inhomogeneity and unreleased strain. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2011
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