Laser conoscopy of LiNbO3:Mg single crystals

被引：0
|
作者：
Pikul O.Y. [1 ]
Sidorov N.V. [2 ]
Makarova O.V. [2 ]
Palatnikov M.N. [2 ]
机构：
[1] Far Eastern State University of Communications, Khabarovsk
[2] Tananaev Institute of Chemistry and Technology of Rare Earth Elements and Mineral Raw Materials, Cola Scientific Center, Russian Academy of Sciences, Murmansk oblast
来源：
Inorganic Materials: Applied Research | 2014年 / 5卷 / 2期
关键词：
Conoscopic patterns; Lithium niobate; Optical homogeneity;
D O I：
10.1134/S2075113314020166
中图分类号：
学科分类号：
摘要：
Optical homogeneity and subtle features of the structural distortions in a series of lithium niobate (LiNbO3) single crystals of congruent composition doped with Mg2+ (0.01-5.5 mol %) are analyzed by laser conoscopy using a He-Ne laser (γ = 632.8 nm) with a power below 1 mW. Standard and distorted conoscopic patterns are observed for LiNbO3:Mg (0.01-1.5 mol %) and LiNbO3:Mg (3.0-5.5 mol %) samples, respec- tively. It is shown that the structural imperfection and optical anomalies reach a maximum at concentrations of about 3 mol % Mg2+ and are due to the inhomogeneity of Mg2+ incorporation into the structure at con- centrations ≥3 mol %. The latter can be caused by the change in the mechanism of Mg2+ incorporation into the crystal structure at Mg2+ concentrations ≥3 mol%. © 2014 Pleiades Publishing, Ltd.
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页码：189 / 197
页数：8
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