Structural Features, Physicochemical, and Optical Characteristics of Lithium Niobate Crystals Grown from Boron-Doped Melts

Journal Article · Sat Dec 15 04:00:00 EST 2018 · Technical Physics

DOI:https://doi.org/10.1134/S1063784218120198· OSTI ID:22925388

Teplyakova, N. A.; Titov, R. A.; Palatnikov, M. N. ^[1]

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1. Tananaev Institute of Chemistry and Technology of Rare Elements and Mineral Raw Materials, Kola Science Center, Russian Academy of Sciences (Russian Federation)

Chemical interactions in the Li{sub 2}O−B{sub 2}O{sub 3}−Nb{sub 2}O{sub 5} system, as well as certain features of crystallization of LiNbO{sub 3} crystals growing from melts containing nonmetal impurities, are considered. It is shown that boron changes the structure of the melt and has a significant impact on the structure and physical characteristics of LiNbO{sub 3} : В crystals, practically not entering the lithium niobate structure. Notable changes and certain features were found in the Raman spectra of grown LiNbO{sub 3} : В crystals, which indicates changing the sequence of the main cations and vacancies along a crystal polar axis and distortion of the oxygen octahedrons. Meanwhile, the distortion of the oxygen octahedrons is anisotropic. LiNbO{sub 3} : В crystals have a higher structural homogeneity than congruent crystals, and are close in the number of NbLi defects to a crystal with a stoichiometric composition, differing from it by a substantially less photorefraction effect.

• OSTI ID: 22925388
• Journal Information: Technical Physics, Journal Name: Technical Physics Journal Issue: 12 Vol. 63; ISSN 1063-7842
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANISOTROPY
BORON
BORON OXIDES
CATIONS
CRYSTALLIZATION
CRYSTALS
DOPED MATERIALS
IMPURITIES
LITHIUM OXIDES
NIOBATES
OXYGEN
RAMAN SPECTRA
STOICHIOMETRY
VACANCIES