About: The negative phonon confinement effect in nanoscopic sodium nitrite

Facets (new session)
Description
Metadata
Settings
- owl:sameAs
- Inference Rule:

About: The negative phonon confinement effect in nanoscopic sodium nitrite Goto Sponge NotDistinct Permalink

An Entity of Type : http://linked.opendata.cz/ontology/domain/vavai/Vysledek, within Data Space : linked.opendata.cz associated with source document(s)

Attributes	Values
rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	A nanocomposite of porous glass and a NaNO2 ferroelectric (channels of 7 nm diameter) was studied using infrared reflectivity, THz transmission and Raman spectroscopy as a function of temperature in the range of 300-500 K, including the ferroelectric transition. From the infrared and THz response the effective dielectric function was calculated and compared with the dielectric functions calculated from the Bruggeman and Lichtenecker models of the effective medium, using the known data on the polar phonon modes of the NaNO2 single crystals. The results show good qualitative agreement, indicating that the stiffening of the effective modes is due to local depolarization fields on the glass-ferroelectric interfaces. The nonpolar Raman modes show no substantial modification compared to those of the bulk NaNO2. Some signatures of the ferroelectric transition were even seen. The results indicate that the intrinsic size effect (phonon confinement) is negligible in this nanocomposite. A nanocomposite of porous glass and a NaNO2 ferroelectric (channels of 7 nm diameter) was studied using infrared reflectivity, THz transmission and Raman spectroscopy as a function of temperature in the range of 300-500 K, including the ferroelectric transition. From the infrared and THz response the effective dielectric function was calculated and compared with the dielectric functions calculated from the Bruggeman and Lichtenecker models of the effective medium, using the known data on the polar phonon modes of the NaNO2 single crystals. The results show good qualitative agreement, indicating that the stiffening of the effective modes is due to local depolarization fields on the glass-ferroelectric interfaces. The nonpolar Raman modes show no substantial modification compared to those of the bulk NaNO2. Some signatures of the ferroelectric transition were even seen. The results indicate that the intrinsic size effect (phonon confinement) is negligible in this nanocomposite. (en)
Title	The negative phonon confinement effect in nanoscopic sodium nitrite The negative phonon confinement effect in nanoscopic sodium nitrite (en)
skos:prefLabel	The negative phonon confinement effect in nanoscopic sodium nitrite The negative phonon confinement effect in nanoscopic sodium nitrite (en)
skos:notation	RIV/68378271:_____/09:00330274!RIV10-AV0-68378271
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(GA202/09/0682), P(KJB100100704), Z(AV0Z10100520)
http://linked.open...iv/cisloPeriodika	39
http://linked.open...vai/riv/dodaniDat	2010
http://linked.open...aciTvurceVysledku	Pokorný, Jan Petzelt, Jan Nuzhnyy, Dmitry Kamba, Stanislav
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	328873
http://linked.open...ai/riv/idVysledku	RIV/68378271:_____/09:00330274
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	nanocomposite; sodium nitrite; infrared; THz; Raman; phonon; effective medium approach (en)
http://linked.open.../riv/klicoveSlovo	Raman infrared nanocomposite effective medium approach phonon sodium nitrite THz
http://linked.open...odStatuVydavatele	GB - Spojené království Velké Británie a Severního Irska
http://linked.open...ontrolniKodProRIV	[1DEC12364B9A]
http://linked.open...i/riv/nazevZdroje	Nanotechnology
http://linked.open...in/vavai/riv/obor	BM
http://linked.open...ichTvurcuVysledku	4 (xsd:int)
http://linked.open...cetTvurcuVysledku	7 (xsd:int)
http://linked.open...vavai/riv/projekt	Dielectric spectroscopy and lattice dynamics of magnetoelectric multiferroics and strained ferroelectric thin films Size effect in ferroelectrics
http://linked.open...UplatneniVysledku	2009
http://linked.open...v/svazekPeriodika	20
http://linked.open...iv/tvurceVysledku	Kamba, Stanislav Nuzhnyy, Dmitry Pokorný, Jan Petzelt, Jan Vakhrushev, S. B. Koroleva, E. Yu. Kumzerov, Y. A.
http://linked.open...ain/vavai/riv/wos	000269553500017
http://linked.open...n/vavai/riv/zamer	Specific effects in condensed systems with reduced dimension and broken symmetry
issn	0957-4484
number of pages	7 (xsd:int)
is http://linked.open...avai/riv/vysledek of	The negative phonon confinement effect in nanoscopic sodium nitrite The negative phonon confinement effect in nanoscopic sodium nitrite The negative phonon confinement effect in nanoscopic sodium nitrite The negative phonon confinement effect in nanoscopic sodium nitrite

Faceted Search & Find service v1.16.118 as of Jun 21 2024

Alternative Linked Data Documents: ODE Content Formats:

RDF

ODATA

Microdata

About

OpenLink Virtuoso version 07.20.3240 as of Jun 21 2024, on Linux (x86_64-pc-linux-gnu), Single-Server Edition (126 GB total memory, 58 GB memory in use)
Data on this page belongs to its respective rights holders.
Virtuoso Faceted Browser Copyright © 2009-2024 OpenLink Software