論文

2009年11月

Luminescent impurity ion probe and low temperature phase of SrTiO3 nanoparticles

MATERIALS SCIENCE AND TECHNOLOGY
  • Z. Potucek
  • ,
  • V. A. Trepakov
  • ,
  • M. V. Makarova
  • ,
  • P. Sazama
  • ,
  • A. G. Badalyan
  • ,
  • A. Dejneka
  • ,
  • L. Jastrabik

25
11
開始ページ
1334
終了ページ
1340
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1179/026708309X12474766656416
出版者・発行元
TAYLOR & FRANCIS LTD

Optical absorption and photoluminescence of Cr3+ impurity ion probe were studied on nanocrystalline SrTiO3/Cr(0.1%) powders with an average particle size between 13 and 100 nm prepared by the Pechini type polymeric sol-gel method. Only O-h(1) cubic perovskite phase was revealed in the powders at room temperature. The optical absorption edge and the position of the zero-phonon emission R-line of the octahedral Cr3+ centres shifted to higher energies with decreasing particle size. The temperature shift of the R-line position appeared for all powders nearly the same as the 'dielectric related' one in the bulk crystals, evidencing that SrTiO3 retains quantum paraelectric behaviour down to a particle size of about 10 nm. However, behaviour of the R-line position was unstable at low temperatures in powders with a particle size of about 13 and 20 nm. This instability was speculated as a manifestation of a possible low temperature ferroelectric phase transition in small enough SrTiO3 nanoparticles.

Web of Science ® 被引用回数 : 2

リンク情報
DOI
https://doi.org/10.1179/026708309X12474766656416
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000272049300009&DestApp=WOS_CPL
URL
https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=70749126418&origin=inward

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