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Structural effects of Li and Nb codoping in a KTaO3matrix: A Raman investigation
- Source :
- Radiation Effects and Defects in Solids; November 2001, Vol. 155 Issue: 1-4 p259-263, 5p
- Publication Year :
- 2001
-
Abstract
- AbstractRaman investigations on single crystals of K1−xLixTa1−yNbyO3were performed to identify structural effects arising from the simultaneous presence of off-centre Li and Nb ions in the incipient ferroelectric KTaO3. Two soft-mode transitions were evidenced at 45K and 30K in a sample with x= 0.0014 and y= 0.024 after both zero-field and field cooling. These temperatures are close to the maximum and to the extrapolated Curie temperature for nonrelaxing permittivity reported in the same system. A sample with x= 0.0028 and y= 0.013 displayed a ferroelectric transition just below 30K only after field cooling, also being consistent with permittivity data.
Details
- Language :
- English
- ISSN :
- 10420150 and 10294953
- Volume :
- 155
- Issue :
- 1-4
- Database :
- Supplemental Index
- Journal :
- Radiation Effects and Defects in Solids
- Publication Type :
- Periodical
- Accession number :
- ejs11805797
- Full Text :
- https://doi.org/10.1080/10420150108214124