Determination of Stoichiometry, Concentration of OH Groups, and Point Defects in Lithium Niobate Crystals from Their IR Absorption Spectra
| Autor: | M. N. Palatnikov, N. V. Sidorov, Natalya A. Teplyakova |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Lithium niobate Analytical chemistry Physics::Optics Crystallographic defect Atomic and Molecular Physics and Optics Spectral line Electronic Optical and Magnetic Materials Condensed Matter::Materials Science symbols.namesake chemistry.chemical_compound chemistry Octahedron Impurity Condensed Matter::Superconductivity Physics::Atomic and Molecular Clusters symbols Raman spectroscopy Raman scattering Stoichiometry |
| Zdroj: | Optics and Spectroscopy. 128:1131-1137 |
| ISSN: | 1562-6911 0030-400X |
| Popis: | The concentration of OH impurity groups, the Li/Nb ratio, the concentration of Nb $$_{{{\text{Li}}}}^{{4 + }}$$ and V $$_{{{\text{Li}}}}^{ - }$$ point defects in stoichiometric and congruent LiNbO3 crystals, as well as in crystals doped with magnesium and zinc at concentrations close to threshold concentrations, have been calculated from IR absorption spectra in the range of stretching vibrations of OH groups. The behavior of bands in the IR absorption spectra of heavily doped LiNbO3:Mg and LiNbO3:Zn crystals has been revealed to correlate with the behavior of the Raman spectrum line that corresponds to stretching bridge vibrations of oxygen atoms in the NbO6 octahedron along the polar axis. |
| Databáze: | OpenAIRE |
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