Počet záznamů: 1

Terahertz and far infrared response of Ba.sub.x./sub.Sr.sub.1-x./sub.TiO.sub.3./sub. films

  1. 1.
    0353071 - FZU-D 2011 RIV GB eng J - Článek v odborném periodiku
    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
    Grant CEP: GA ČR GAP204/10/0616; GA MŠk ME08109
    Výzkumný záměr: CEZ:AV0Z10100520
    Klíčová slova: thin films * complex dielectric function * time-domain terahertz spectroscopy * infrared transmittance
    Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
    Impakt faktor: 1.006, rok: 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.
    Trvalý link: http://hdl.handle.net/11104/0192415