About: Dielectric relaxation and polar phonon softening in relaxor ferroelectric PbMg1/3Ta2/3O3.

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Description	Relaxor ferroelectric PbMg1/3Ta2/3O3 ceramics and thin films were investigated by means of broad-band dielectric, time-domain terahertz (THz), and Fourier-transform infrared (IR) spectroscopy in the frequency range 100 Hz–90 THz at temperatures 20 to 900 K. The relaxation appears below the Burns temperature Td in the THz range; it slows down on cooling through the microwave and MHz range and anomalously broadens. IR spectra give evidence about the lower local symmetry, which can be assigned to the presence of the polar clusters below Td. Relaxor ferroelectric PbMg1/3Ta2/3O3 ceramics and thin films were investigated by means of broad-band dielectric, time-domain terahertz (THz), and Fourier-transform infrared (IR) spectroscopy in the frequency range 100 Hz–90 THz at temperatures 20 to 900 K. The relaxation appears below the Burns temperature Td in the THz range; it slows down on cooling through the microwave and MHz range and anomalously broadens. IR spectra give evidence about the lower local symmetry, which can be assigned to the presence of the polar clusters below Td. (en) Relaxační feroelektrikum PMT ve formě keramik a tenkých vrstev bylo studováno pomocí širokopásmové dielektrické, THz a infračervené Fourierovy spektroskopie ve frekvenčním oboru 100 Hz – 90 THz při teplotách od 20 do 900 K. Pod Burnsovou teplotou u 700 K vznikají polární klastry, jejichž dynamika je vidět v Thz oblasti. S ochlazováním relaxační frekvence měkne do mikrovlnné a Mhz oblasti a zároveň se relaxace anomálně rozšiřuje. Infračervená spektra svědčí o nekubické lokální symetrii, která se vysvětlila existencí polárních klastrů. (cs)
Title	Dielectric relaxation and polar phonon softening in relaxor ferroelectric PbMg1/3Ta2/3O3. Dielektrická relaxace a měknutí polárního fononu v relaxačním feroelektriku PMT (cs) Dielectric relaxation and polar phonon softening in relaxor ferroelectric PbMg1/3Ta2/3O3. (en)
skos:prefLabel	Dielectric relaxation and polar phonon softening in relaxor ferroelectric PbMg1/3Ta2/3O3. Dielektrická relaxace a měknutí polárního fononu v relaxačním feroelektriku PMT (cs) Dielectric relaxation and polar phonon softening in relaxor ferroelectric PbMg1/3Ta2/3O3. (en)
skos:notation	RIV/68378271:_____/07:00088512!RIV08-AV0-68378271
http://linked.open.../vavai/riv/strany	074106/1;074106/9
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(GA202/06/0403), P(OC 101), Z(AV0Z10100520)
http://linked.open...iv/cisloPeriodika	7
http://linked.open...vai/riv/dodaniDat	2008
http://linked.open...aciTvurceVysledku	Petzelt, Jan Nuzhnyy, Dmitry Kamba, Stanislav Bovtun, Viktor Veljko, Sergiy
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Fyzikální ústav AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	417200
http://linked.open...ai/riv/idVysledku	RIV/68378271:_____/07:00088512
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	relaxor ferroelectrics; dielectric spectroscopy; soft modes (en)
http://linked.open.../riv/klicoveSlovo	relaxor ferroelectrics dielectric spectroscopy soft modes
http://linked.open...odStatuVydavatele	US - Spojené státy americké
http://linked.open...ontrolniKodProRIV	[A0325168D90F]
http://linked.open...i/riv/nazevZdroje	Journal of Applied Physics
http://linked.open...in/vavai/riv/obor	BM
http://linked.open...ichTvurcuVysledku	5 (xsd:int)
http://linked.open...cetTvurcuVysledku	11 (xsd:int)
http://linked.open...vavai/riv/projekt	http://linked.opendata.cz/resource/domain/vavai/projekt/OC%20101 Broad-band dielektric spectroscopy of relaxor ferroelectrics and multiferroics
http://linked.open...UplatneniVysledku	2007
http://linked.open...v/svazekPeriodika	102
http://linked.open...iv/tvurceVysledku	Bovtun, Viktor Kamba, Stanislav Petzelt, Jan Setter, N. Tyunina, M. Wang, Y. L. Levoska, J. Noujni, Dmitri Veljko, Sergiy Banys, J. Macutkevic, J.
http://linked.open...n/vavai/riv/zamer	Specific effects in condensed systems with reduced dimension and broken symmetry
issn	0021-8979
number of pages	9 (xsd:int)
is http://linked.open...avai/riv/vysledek of	Dielectric relaxation and polar phonon softening in relaxor ferroelectric PbMg1/3Ta2/3O3. Dielectric relaxation and polar phonon softening in relaxor ferroelectric PbMg1/3Ta2/3O3. Dielectric relaxation and polar phonon softening in relaxor ferroelectric PbMg1/3Ta2/3O3.

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