Grain Boundary and Size Effect on the Dielectric, Infrared and Raman Response of SrTiO3 Nanograin Ceramics

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F08%3APU75845" target="_blank" >RIV/00216305:26210/08:PU75845 - isvavai.cz</a>

Alternative codes found

RIV/68378271:_____/08:00309755

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Grain Boundary and Size Effect on the Dielectric, Infrared and Raman Response of SrTiO3 Nanograin Ceramics

Original language description

The recently revealed giant grain size effect on dielectric properties in undoped SrTiO3 ceramics (J. Petzelt et al., J. Phys.: Condens. Matter 19, 196222 (2007) and references therein), was extended to smaller grains of 80 nm mean grain size. Like for previously studied ceramics with larger grain size, in addition to dielectric permittivity also the infrared and Raman responses were studied and discussed. It was shown that the reduced effective permittivity is fully accounted for by the infrared soft mode behaviour and, similar to single crystals and other ceramics studied, no dielectric dispersion appears below the THz frequency range. The rather universal (independent of the grain size and sintering process) double dead layer structure was proposedto be responsible for the observed changes in the infrared and Raman spectra, allowing the grain core to keep the single crystal dielectric function. The outer dead layer shell (obviously charged due to an oxygen deficit) is very thin (ca

Czech name

Vliv velikosti a hranic zrn na dielektrickou, infračervenou a ramanovskou odezvu SrTiO3 nanokeramiky

Czech description

Článek rozšiřuje nedávno objevený obrovský vliv velikosti zrn na dielektrické vlastnosti SrTiO3 keramiky až do nanokeramické oblasti. K tomu sloužila nedávno poprvé připravená hutná (98%t.h.) SrTiO3 keramika s velikostí zrn 80um.

Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

JH - Ceramics, fire-proof materials and glass

OECD FORD branch

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Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2008

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

FERROELECTRICS

ISSN

0015-0193

e-ISSN

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Volume of the periodical

363

Issue of the periodical within the volume

1

Country of publishing house

GB - UNITED KINGDOM

Number of pages

18

Pages from-to

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UT code for WoS article

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EID of the result in the Scopus database

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