. "Ku\u017Eel, Petr" . "16" . "0953-8984" . . "[31A95E4F9FD7]" . . "Petzelt, Jan" . . "RIV/68378271:_____/04:00029286!RIV06-AV0-68378271" . "RIV/68378271:_____/04:00029286" . "-" . "Komplexn\u00ED dielektrick\u00E1 spektra vrystvy SrBi2Ta2O9 na saf\u00EDrov\u00E9m substr\u00E1tu v teplotn\u00EDm intervalu 300--23 K byla zm\u011B\u0159ena pomoc\u00ED terahertzov\u00E9 spketroskopi v \u010Dasov\u00E9 dom\u00E9n\u011B. Optick\u00FD fonon s nejni\u017E\u0161\u00ED frekvenc\u00ED (u 28 cm-1) nevykazuje \u017E\u00E1dnou anom\u00E1lii v bl\u00EDzkosti f\u00E1zov\u00FDch p\u0159echod\u016F. Ukazujeme, \u017Ee dielektrick\u00E1 anom\u00E1lie pobl\u00ED\u017E fotoelektrick\u00E9ho p\u0159echodu m\u016F\u017Ee b\u00FDt vysv\u011Btlena m\u011Bknut\u00EDm relaxa\u010Dn\u00EDho m\u00F3du v terahertzov\u00FDch spektrech"@cs . . "Kadlec, Filip" . . . "Vysokoteplotn\u00ED f\u00E1zov\u00E9 p\u0159echody v tenk\u00E9 vrystv\u011B SrBi2Ta2O9 studovan\u00E9 pomoc\u00ED terahertzov\u00E9 spektroskopie"@cs . . "Journal of Physics. Condensed Matter" . . "High-temperature phase transitions in SrBi2Ta2O9 film: a study by THz spectroscopy"@en . "6763;6769" . . "A time-domain THz transmission experiment was performed on a SrBi2Ta2O9 film deposited on a sapphire substrate. Temperatures between 300 and 923 K were investigated and complex permittivity spectrs of the film were determined. The lowest-frequency optical phonon near 28 cm-1 reveals no significant anomaly near the phase transitions. We show that dielectric anomaly near the ferroelectric phase transition can be explained by the slowing down of a relaxational mode observed in the THz spectra"@en . . "P(GA202/04/0993), P(IAA1010213), P(KSK1010104), P(LN00A032), Z(AV0Z1010914)" . . "High-temperature phase transitions in SrBi2Ta2O9 film: a study by THz spectroscopy" . . "A time-domain THz transmission experiment was performed on a SrBi2Ta2O9 film deposited on a sapphire substrate. Temperatures between 300 and 923 K were investigated and complex permittivity spectrs of the film were determined. The lowest-frequency optical phonon near 28 cm-1 reveals no significant anomaly near the phase transitions. We show that dielectric anomaly near the ferroelectric phase transition can be explained by the slowing down of a relaxational mode observed in the THz spectra" . . . . . "6"^^ . . "8"^^ . "6"^^ . . "Kadlec, Christelle" . . "Kamba, Stanislav" . "High-temperature phase transitions in SrBi2Ta2O9 film: a study by THz spectroscopy"@en . . "Vysokoteplotn\u00ED f\u00E1zov\u00E9 p\u0159echody v tenk\u00E9 vrystv\u011B SrBi2Ta2O9 studovan\u00E9 pomoc\u00ED terahertzov\u00E9 spektroskopie"@cs . "GB - Spojen\u00E9 kr\u00E1lovstv\u00ED Velk\u00E9 Brit\u00E1nie a Severn\u00EDho Irska" . "Kroupa, Jan" . . "566190" . "High-temperature phase transitions in SrBi2Ta2O9 film: a study by THz spectroscopy" . . . "THz spectroscopy; ferroelectricity; phase transitions"@en . .