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Statements

Subject Item
n2:RIV%2F68378271%3A_____%2F11%3A00368188%21RIV12-AV0-68378271
rdf:type
skos:Concept n11:Vysledek
dcterms:description
Infrared (IR) reflectivity spectra of nominally pure Pb(Zr1-xTix)O3 ceramics with different Ti/Zr concentration (x = 0.42 – 0.58) were measured and evaluated along with the time-domain THz transmittance spectra in the temperature range 10 – 900 K. The temperature dependence of the low-frequency vibrations, related to Pb atoms, was analyzed in terms of two overdamped modes –a soft mode and an anharmonic hopping central mode– 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. Infrared (IR) reflectivity spectra of nominally pure Pb(Zr1-xTix)O3 ceramics with different Ti/Zr concentration (x = 0.42 – 0.58) were measured and evaluated along with the time-domain THz transmittance spectra in the temperature range 10 – 900 K. The temperature dependence of the low-frequency vibrations, related to Pb atoms, was analyzed in terms of two overdamped modes –a soft mode and an anharmonic hopping central mode– 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.
dcterms:title
Polar lattice vibrations and phase transition dynamics in Pb(Zr1-xTix)O3. Polar lattice vibrations and phase transition dynamics in Pb(Zr1-xTix)O3.
skos:prefLabel
Polar lattice vibrations and phase transition dynamics in Pb(Zr1-xTix)O3. Polar lattice vibrations and phase transition dynamics in Pb(Zr1-xTix)O3.
skos:notation
RIV/68378271:_____/11:00368188!RIV12-AV0-68378271
n11:predkladatel
n15:ico%3A68378271
n3:aktivita
n18:P n18:Z
n3:aktivity
P(GAP204/10/0616), Z(AV0Z10100520)
n3:cisloPeriodika
18
n3:dodaniDat
n19:2012
n3:domaciTvurceVysledku
Buixaderas, Elena n9:6699189 n9:3635031
n3:druhVysledku
n14:J
n3:duvernostUdaju
n5:S
n3:entitaPredkladatele
n13:predkladatel
n3:idSjednocenehoVysledku
221058
n3:idVysledku
RIV/68378271:_____/11:00368188
n3:jazykVysledku
n12:eng
n3:klicovaSlova
phonons; lattice dynamics; PZT; IR spectroscopy
n3:klicoveSlovo
n7:IR%20spectroscopy n7:phonons n7:PZT n7:lattice%20dynamics
n3:kodStatuVydavatele
US - Spojené státy americké
n3:kontrolniKodProRIV
[03393BCD6364]
n3:nazevZdroje
Physical Review. B
n3:obor
n6:BM
n3:pocetDomacichTvurcuVysledku
3
n3:pocetTvurcuVysledku
5
n3:projekt
n20:GAP204%2F10%2F0616
n3:rokUplatneniVysledku
n19:2011
n3:svazekPeriodika
84
n3:tvurceVysledku
Nuzhnyy, Dmitry Petzelt, Jan Damjanović, D. Buixaderas, Elena Jin, L.
n3:wos
000297100900005
n3:zamer
n17:AV0Z10100520
s:issn
1098-0121
s:numberOfPages
12
n4:doi
10.1103/PhysRevB.84.184302