ISSN: 2311-1801
| Sidorov N.V. | Institute of Chemistry and Technology of Rare Elements and Mineral Raw Materials of the Kola Science Center of the Russian Academy of Sciences, sidorov@chemy.kolasc.net.ru |
| Teplyakova N.А. | Institute of Chemistry and Technology of Rare Elements and Mineral Raw Materials of the Kola Science Center of the Russian Academy of Sciences, tepl_na@chemy.kolasc.net.ru |
| Gabain А.А. | Institute of Chemistry and Technology of Rare Elements and Mineral Raw Materials of the Kola Science Center of the Russian Academy of Sciences, fleischermed@gmail.com |
| Yanichev А.А. | Institute of Chemistry and Technology of Rare Elements and Mineral Raw Materials of the Kola Science Center of the Russian Academy of Sciences, Jovial1985@yandex.ru |
| Palatnikov M.N. | Institute of Chemistry and Technology of Rare Elements and Mineral Raw Materials of the Kola Science Center of the Russian Academy of Sciences, palat_mn@chemy.kolasc.net.ru |
| Efremov I.N. | Institute of Chemistry and Technology of Rare Elements and Mineral Raw Materials of the Kola Science Center of the Russian Academy of Sciences, i.efremov@mail.ru |
| Makarova О.V. | Institute of Chemistry and Technology of Rare Elements and Mineral Raw Materials of the Kola Science Center of the Russian Academy of Sciences, makarova@chemy.kolasc.net.ru |
| Manukovskaya D.V. | Institute of Chemistry and Technology of Rare Elements and Mineral Raw Materials of the Kola Science Center of the Russian Academy of Sciences, manukovskaya@chemy.kolasc.net.ru |
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Key words: Photorefractive Effect Optical Damage Resistance Lithium Niobate Crystals |
Summary: The comparative studies of structural and optical properties of LiNbO3:Zn(0.03÷4.5 mol. %) crystals were carried out by the photoinduced light scattering, Raman spectroscopy, laser conoscopy and fractal analysis. It was shown that photorefraction dependance on the concentration of Zn2+ in lithium niobate crystals is non-monotonic. The decrease of photorefractive effect is described by the structure ordering. The latter happens due to the reduce of defects with localized electrons, that form levels of energy close to the conduction band bottom (trapping levels) and due to radiative recombination of laser-induced photoelectrons. Structure order of the searched crystals also improves due to substitution of structure defects NbLi and Li by Zn2+ cations. The area of increased structure ordering was detected by Raman spectra. The ordering supposes the most right order of main cations, impurities and vacancies along the polar axis for the real crystal. © Petrozavodsk State University |
Is passed for the press: 29 december 2014 year | |