Effect of local changes in the composition of the LiNb1−xTaxO3 single crystal on the Raman spectra

This paper presents the results of studying the effect of local changes in the composition of the LiNb1−xTaxO3 single crystal on the Raman spectra. Analysis of the crystal composition was carried out using laser ablation inductively coupled plasma mass spectrometry. Using statistical analysis of dat...

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Bibliographic Details
Published in:Journal of Raman spectroscopy 2022-05, Vol.53 (5), p.969-976
Main Authors: Irzhak, Artemii, Irzhak, Dmitrii, Khvostikov, Vladimir, Pundikov, Kirill, Roshchupkin, Dmitrii, Fahrtdinov, Rashid
Format: Article
Language:English
Subjects:
Chemical composition
confocal Raman microscopy
Correlation analysis
Inductively coupled plasma mass spectrometry
Laser ablation
Lattice vacancies
LA‐ICP‐MS
Lithium
lithium niobate‐tantalate
Lithium tantalates
Mass spectrometry
Mass spectroscopy
Principal components analysis
Raman spectra
Raman spectroscopy
Single crystals
Statistical analysis
Tantalum
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Summary:This paper presents the results of studying the effect of local changes in the composition of the LiNb1−xTaxO3 single crystal on the Raman spectra. Analysis of the crystal composition was carried out using laser ablation inductively coupled plasma mass spectrometry. Using statistical analysis of data on local changes in the chemical composition of a single crystal, it was found that Nb atoms partially replace Li vacancies. Using principal component analysis in combination with correlation analysis, the contribution of a change in the crystal composition to a change in the Raman spectra is determined. Found principal components correctly predict the shift of the Raman lines at transition of the crystal composition from niobate to lithium tantalate. During the formation of a mixed LiNb1−xTaxO3 crystal, at small amounts of Ta atoms replacing Nb, the substitution occurs in the cation sublattice. Effect of local changes in the composition of the LiNb1−xTaxO3 single crystal on the Raman spectra have been studied using principal component analysis in combination with correlation analysis. Found principal components correctly predict the shift of the Raman lines at transition of the crystal composition from niobate to lithium tantalate.
ISSN:0377-0486
1097-4555
DOI:10.1002/jrs.6313