About: THz and IR dielectric response of BaTiO3 core-shell composites: evidence for interdiffusion

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Time-domain THz transmission and FTIR reflectivity spectra of dense core–shell composites of the BaZr0.2Ti0.8O3, BaZr0.4Ti0.6O3, Ba0.66Sr0.34TiO3 and Ba0.45Sr0.55TiO3 compositions were studied in a broad temperature range of 10-900 K. The spectra were evaluated to obtain the complex dielectric functions and at room temperature they were compared with the prediction of the generalized brick-wall model based on the effective medium approximation. The model was analysed concerning the dielectric losses and electric-field tunability below the polar phonon frequency range. Whereas the predicted losses are much reduced compared with those of the cores, the observed enhanced losses in the THz range give evidence of an interdiffusion of the BaTiO3 cores into the shells. Time-domain THz transmission and FTIR reflectivity spectra of dense core–shell composites of the BaZr0.2Ti0.8O3, BaZr0.4Ti0.6O3, Ba0.66Sr0.34TiO3 and Ba0.45Sr0.55TiO3 compositions were studied in a broad temperature range of 10-900 K. The spectra were evaluated to obtain the complex dielectric functions and at room temperature they were compared with the prediction of the generalized brick-wall model based on the effective medium approximation. The model was analysed concerning the dielectric losses and electric-field tunability below the polar phonon frequency range. Whereas the predicted losses are much reduced compared with those of the cores, the observed enhanced losses in the THz range give evidence of an interdiffusion of the BaTiO3 cores into the shells. (en)
Title	THz and IR dielectric response of BaTiO3 core-shell composites: evidence for interdiffusion THz and IR dielectric response of BaTiO3 core-shell composites: evidence for interdiffusion (en)
skos:prefLabel	THz and IR dielectric response of BaTiO3 core-shell composites: evidence for interdiffusion THz and IR dielectric response of BaTiO3 core-shell composites: evidence for interdiffusion (en)
skos:notation	RIV/68378271:_____/09:00330281!RIV10-AV0-68378271
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(KJB100100704), Z(AV0Z10100520)
http://linked.open...iv/cisloPeriodika	15
http://linked.open...vai/riv/dodaniDat	2010
http://linked.open...aciTvurceVysledku	Petzelt, Jan Nuzhnyy, Dmitry Rychetský, Ivan
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	346320
http://linked.open...ai/riv/idVysledku	RIV/68378271:_____/09:00330281
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	THz and IR spectroscopy; core-shell; effective medium approximation; dielectric response (en)
http://linked.open.../riv/klicoveSlovo	dielectric response core-shell THz and IR spectroscopy effective medium approximation
http://linked.open...odStatuVydavatele	GB - Spojené království Velké Británie a Severního Irska
http://linked.open...ontrolniKodProRIV	[4D3144B08891]
http://linked.open...i/riv/nazevZdroje	Journal of Physics D-Applied Physics
http://linked.open...in/vavai/riv/obor	BM
http://linked.open...ichTvurcuVysledku	3 (xsd:int)
http://linked.open...cetTvurcuVysledku	6 (xsd:int)
http://linked.open...vavai/riv/projekt	Size effect in ferroelectrics
http://linked.open...UplatneniVysledku	2009
http://linked.open...v/svazekPeriodika	42
http://linked.open...iv/tvurceVysledku	Nuzhnyy, Dmitry Rychetský, Ivan Petzelt, Jan Buscaglia, M. T. Buscaglia, V. Nanni, P.
http://linked.open...ain/vavai/riv/wos	000268042200036
http://linked.open...n/vavai/riv/zamer	Specific effects in condensed systems with reduced dimension and broken symmetry
issn	0022-3727
number of pages	8 (xsd:int)
is http://linked.open...avai/riv/vysledek of	THz and IR dielectric response of BaTiO3 core-shell composites: evidence for interdiffusion THz and IR dielectric response of BaTiO3 core-shell composites: evidence for interdiffusion THz and IR dielectric response of BaTiO3 core-shell composites: evidence for interdiffusion THz and IR dielectric response of BaTiO3 core-shell composites: evidence for interdiffusion

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