Number of the records: 1
Terahertz and far infrared response of Ba.sub.x./sub.Sr.sub.1-x./sub.TiO.sub.3./sub. films
- 1.0353071 - FZÚ 2011 RIV GB eng J - Journal Article
Simon, Elizabeth - Ostapchuk, Tetyana - Kužel, Petr - Hlinka, Jiří - Kamba, Stanislav - Nguema, E. - Mounaix, P. - Carru, J.C. - Velu, G.
Terahertz and far infrared response of BaxSr1-xTiO3 films.
Phase Transitions. Roč. 83, 10-11 (2010), s. 966-973. ISSN 0141-1594. E-ISSN 1029-0338
R&D Projects: GA ČR GAP204/10/0616; GA MŠMT ME08109
Institutional research plan: CEZ:AV0Z10100520
Keywords : thin films * complex dielectric function * time-domain terahertz spectroscopy * infrared transmittance
Subject RIV: BM - Solid Matter Physics ; Magnetism
Impact factor: 1.006, year: 2010
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.
Permanent Link: http://hdl.handle.net/11104/0192415
Number of the records: 1