| 高掺镁浓度铌酸锂晶体的OH吸收谱 |
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| 引用本文： | 冯锡淇,邓棠波.高掺镁浓度铌酸锂晶体的OH吸收谱[J].无机材料学报,1993,8(3):273-280. |
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| 作者姓名： | 冯锡淇 邓棠波 |
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| 作者单位： | 中国科学院上海硅酸盐研究所，香港浸会学院物理系 200050 |
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| 基金项目： | 国家自然科学基金资助课题 |
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| 摘 要： |
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| 关 键 词： | 铌酸锂 浓度 阈直效应 缺陷 硅酸盐 |
OH Absorption Spectra in Heavily Mg-doped LiNbO_3 Crystals |
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| Feng Xiqi.OH Absorption Spectra in Heavily Mg-doped LiNbO_3 Crystals[J].Journal of Inorganic Materials,1993,8(3):273-280. |
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| Authors: | Feng Xiqi |
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| Abstract: | In the present study the OH infrared absorption spectra of a group of heavily Mg-doped
LiNbO_3 crystals codoped with trivalent or divalent cation impurity are investigated.Some of
them are correlated with the ESR results.Attempt to find a relationship between the spectra
and the site of incorporation of impurities,which is strongly affected by the so-called Mg doping
level threshold effect.A main OH band peaked at 3536cm~(-1) occurs in all the samples.The
band is attributed to the OH stretching vibration in the Mg_(Nb)-OH-Mg_(Li) complex.There
are some additional OH bands occurred in the Me~(3+),Mg codoped LiNbO_3 samples(Me=Fe,
Cr and Nd respectively).They are attributed to the OH stretching vibration in the Me_(Nb)-
OH-Mg_(LI) complex,whose peak position depends on the charge misfit and the ionic radius of
the cation impurities.There is no additional OH band occurred in the Mg,Er:LiNbO_3,Mg,
Ho:LiNbO_3 and Mg,Tm:LiNbO_3 crystals.A simple scheme is proposed that depicts whether
such new feature appears,depending on the ionic radius and the electronegativity of the Me~(3+) |
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| Keywords: | Lithium niobate Mg doping level effect OH absorption bands Defects containing hydrogen |
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