About: Composition dependence of the lattice vibrations in Srn+1TinO3n+1, Ruddlesden-Popper homologous series

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Room-temperature infrared reflectivities, time-domain THz transmission spectra and micro-Raman spectra of ceramics in the Ruddlesden Popper homologous series, Srn+1TinO3n+1 (where n=1, 2, 3, 4, infinity), were studied. Increasing the number of perovskite layers (n) in the crystal system resulted in higher polarizability of the lattice and softening of the lowest frequency phonon mode, which is responsible for the observed increase in microwave permittivity, dielectric loss and temperature coefficient of resonance frequency with n. Although the infrared and Raman spectra revealed many defects in the ceramics (e.g. second phases and stacking faults), the extrapolation of experimental submillimetre dielectric data to the microwave region showed no dielectric dispersion below the phonon frequencies and prevailingly an intrinsic origin of losses in the microwave region in almost all samples (except for Sr5Ti4O13). Room-temperature infrared reflectivities, time-domain THz transmission spectra and micro-Raman spectra of ceramics in the Ruddlesden Popper homologous series, Srn+1TinO3n+1 (where n=1, 2, 3, 4, infinity), were studied. Increasing the number of perovskite layers (n) in the crystal system resulted in higher polarizability of the lattice and softening of the lowest frequency phonon mode, which is responsible for the observed increase in microwave permittivity, dielectric loss and temperature coefficient of resonance frequency with n. Although the infrared and Raman spectra revealed many defects in the ceramics (e.g. second phases and stacking faults), the extrapolation of experimental submillimetre dielectric data to the microwave region showed no dielectric dispersion below the phonon frequencies and prevailingly an intrinsic origin of losses in the microwave region in almost all samples (except for Sr5Ti4O13). (en)
Title	Composition dependence of the lattice vibrations in Srn+1TinO3n+1, Ruddlesden-Popper homologous series Composition dependence of the lattice vibrations in Srn+1TinO3n+1, Ruddlesden-Popper homologous series (en)
skos:prefLabel	Composition dependence of the lattice vibrations in Srn+1TinO3n+1, Ruddlesden-Popper homologous series Composition dependence of the lattice vibrations in Srn+1TinO3n+1, Ruddlesden-Popper homologous series (en)
skos:notation	RIV/68407700:21340/03:04092435!RIV/2004/MSM/213404/N
http://linked.open.../vavai/riv/strany	2639 ; 2645
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(GA202/01/0612), P(GA203/99/0067), Z(AV0Z1010914), Z(MSM 210000022)
http://linked.open...iv/cisloPeriodika	14
http://linked.open...vai/riv/dodaniDat	2004
http://linked.open...aciTvurceVysledku	Pokorný, Jan
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	České vysoké učení technické v Praze / Fakulta jaderná a fyzikálně inženýrská
http://linked.open...dnocenehoVysledku	601878
http://linked.open...ai/riv/idVysledku	RIV/68407700:21340/03:04092435
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	Dielectric properties; Perovskites; Spectroscopy (en)
http://linked.open.../riv/klicoveSlovo	Spectroscopy Perovskites Dielectric properties
http://linked.open...odStatuVydavatele	NL - Nizozemsko
http://linked.open...ontrolniKodProRIV	[F968CE3984D6]
http://linked.open...i/riv/nazevZdroje	Journal of the European Ceramic Society
http://linked.open...in/vavai/riv/obor	BM
http://linked.open...ichTvurcuVysledku	1 (xsd:int)
http://linked.open...cetTvurcuVysledku	7 (xsd:int)
http://linked.open...vavai/riv/projekt	Soft lattice dynamics in high-permittivity perovskite ceramics and thin films Lease of crystallographic databases
http://linked.open...UplatneniVysledku	2003
http://linked.open...v/svazekPeriodika	23
http://linked.open...iv/tvurceVysledku	Pokorný, Jan Kadlec, F. Kamba, S. Reaney, I. Petzelt, J. Samoukhina, P. Wise, P.
http://linked.open...n/vavai/riv/zamer	Experimentální a teoretický výzkum kondenzovaných systémů s význačnými fyzikálními vlastnostmi http://linked.opendata.cz/resource/domain/vavai/zamer/MSM%20210000022
issn	0955-2219
number of pages	7 (xsd:int)
http://localhost/t...ganizacniJednotka	21340

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