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Soft-mode Raman spectra in K1−xLixTa1−yNbyO3
- Source :
- Ferroelectrics. 254:135-142
- Publication Year :
- 2001
- Publisher :
- Informa UK Limited, 2001.
-
Abstract
- Raman observations in the region of the TO 1 soft mode were performed on samples of K 1-x Li x Ta 1-y Nb y O 3 , having x in the range 0.6 - 1.0 % mol. and y in the range 0.2 - 0.3 % mol. The analysis of temperature evolution and spectral shape allowed to evidence the spontaneous splitting of the TO 1 mode and its relative stiffness below 50 K, accompanied by an abrupt increase of first order scattering strengths. Such effects are not observed when Li or Nb are separately introduced in the KTaO 3 matrix, at the given concentrations.
Details
- ISSN :
- 15635112 and 00150193
- Volume :
- 254
- Database :
- OpenAIRE
- Journal :
- Ferroelectrics
- Accession number :
- edsair.doi...........9464775bf5e18e39b50a4b640a282739
- Full Text :
- https://doi.org/10.1080/00150190108214994