Effect of doping on the Raman modes in MgO‐doped lithium niobate crystals | Zendy

Hu L. J. | Zendy; Chang Y. H. | Zendy; Hu M. L. | Zendy; Chang M. W. | Zendy; Tse W. S. | Zendy

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Effect of doping on the Raman modes in MgO‐doped lithium niobate crystals

Author(s) -

Hu L. J.,

Chang Y. H.,

Hu M. L.,

Chang M. W.,

Tse W. S.

Publication year - 1991

Publication title -

journal of raman spectroscopy

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.748

H-Index - 110

eISSN - 1097-4555

pISSN - 0377-0486

DOI - 10.1002/jrs.1250220606

Subject(s) - raman spectroscopy , lithium niobate , doping , lithium (medication) , crystal (programming language) , analytical chemistry (journal) , materials science , raman scattering , phonon , mineralogy , chemistry , optics , condensed matter physics , optoelectronics , medicine , physics , chromatography , computer science , programming language , endocrinology

Raman spectra of a series of MgO‐doped congruent LiNbO 3 crystals were obtained with MgO concentrations up to 30 mol.%. Single crystals were successfully grown and no precipitates were discovered. The intensity, frequency and line width of the Raman phonons were studied as a function of doping percentage. An abrupt change was observed near the composition of 7.5 mol.% of MgO‐doped LiNbO 3 crystal. From the spectral changes it is proposed that Mg 2+ replaces the mis‐sited Nb 5+ cation at Li sites first. When these mis‐sited Nb 5+ cations have been completely replaced, the Mg 2+ cation then replaces the Li + cation and creates vacancies at Li + sites.

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