0377893 - FZÚ 2013 RIV US eng J - Článek v odborném periodiku
Glinšek, S. - Nuzhnyy, Dmitry - Petzelt, Jan - Malič, B. - Kamba, Stanislav - Bovtun, Viktor - Kempa, Martin - Skoromets, Volodymyr - Kužel, Petr - Gregora, Ivan - Kosec, M.
Lattice dynamics and broad-band dielectric properties of the KTaO₃ ceramics.
Journal of Applied Physics. Roč. 111, č. 10 (2012), "104101-1"-"104101-6". ISSN 0021-8979. E-ISSN 1089-7550
Grant CEP: GA ČR GD202/09/H041; GA ČR GAP204/12/0232
Výzkumný záměr: CEZ:AV0Z10100520
Klíčová slova: IR spectroscopy * incipient ferroelectrics * phonons * Raman spectroscopy
Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
Impakt faktor: 2.210, rok: 2012

The lowest-frequency TO1 mode (soft mode) strongly softens on cooling, while the TO2 and TO4 mode frequencies do not change with temperature. The permittivity does not show any significant dispersion below the soft mode frequency and its value in the kHz and GHz range is mainly given by the intrinsic polar lattice modes contribution.
Trvalý link: http://hdl.handle.net/11104/0209920