"5"^^ . "[03393BCD6364]" . "10.1103/PhysRevB.84.184302" . . "P(GAP204/10/0616), Z(AV0Z10100520)" . . "US - Spojen\u00E9 st\u00E1ty americk\u00E9" . "Nuzhnyy, Dmitry" . "Petzelt, Jan" . "3"^^ . "000297100900005" . . "Buixaderas, Elena" . "Polar lattice vibrations and phase transition dynamics in Pb(Zr1-xTix)O3."@en . . . . "84" . . "Polar lattice vibrations and phase transition dynamics in Pb(Zr1-xTix)O3." . "RIV/68378271:_____/11:00368188!RIV12-AV0-68378271" . "Infrared (IR) reflectivity spectra of nominally pure Pb(Zr1-xTix)O3 ceramics with different Ti/Zr concentration (x = 0.42 \u2013 0.58) were measured and evaluated along with the time-domain THz transmittance spectra in the temperature range 10 \u2013 900 K. The temperature dependence of the low-frequency vibrations, related to Pb atoms, was analyzed in terms of two overdamped modes \u2013a soft mode and an anharmonic hopping central mode\u2013 in the cubic and high-temperature ferroelectric phase, and three main vibrations in the low-temperature ferroelectric phase with the doubled unit cell: two E-symmetry modes (the soft mode and a mode corresponding to anti-phase vibrations of neighbouring Pb atoms in the THz range), and the antiferrodistortive mode producing the anti-phase tilts of the oxygen octahedra. The last bare mode is not IR active, but it becomes activated by coupling with the soft mode." . "Damjanovi\u0107, D." . . . . "18" . . "Physical Review. B" . . . "RIV/68378271:_____/11:00368188" . "1098-0121" . . . . "Polar lattice vibrations and phase transition dynamics in Pb(Zr1-xTix)O3."@en . "12"^^ . . . . "phonons; lattice dynamics; PZT; IR spectroscopy"@en . "Infrared (IR) reflectivity spectra of nominally pure Pb(Zr1-xTix)O3 ceramics with different Ti/Zr concentration (x = 0.42 \u2013 0.58) were measured and evaluated along with the time-domain THz transmittance spectra in the temperature range 10 \u2013 900 K. The temperature dependence of the low-frequency vibrations, related to Pb atoms, was analyzed in terms of two overdamped modes \u2013a soft mode and an anharmonic hopping central mode\u2013 in the cubic and high-temperature ferroelectric phase, and three main vibrations in the low-temperature ferroelectric phase with the doubled unit cell: two E-symmetry modes (the soft mode and a mode corresponding to anti-phase vibrations of neighbouring Pb atoms in the THz range), and the antiferrodistortive mode producing the anti-phase tilts of the oxygen octahedra. The last bare mode is not IR active, but it becomes activated by coupling with the soft mode."@en . "Polar lattice vibrations and phase transition dynamics in Pb(Zr1-xTix)O3." . "221058" . "Buixaderas, Elena" . . "Jin, L." .