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首页> 外文期刊>Journal of Crystal Growth >Crystallographic modifications of physical properties of lithium niobate crystals by the cation location
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Crystallographic modifications of physical properties of lithium niobate crystals by the cation location

机译：阳离子位置对铌酸锂晶体物理性质的晶体学修饰

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摘要

On the basis of crystallographic data of various pure and doped lithium niobate crystals, Pauling's rules, the bond valence sum model and the chemical bond method are employed to understand crystallographic modifications of physical properties of lithium niobate crystals. The physical properties such as dielectric responses (including the principal refractive indices and second-order nonlinear optical coefficients), the spontaneous polarization and the spontaneous strain are quantitatively or qualitatively studied. The present work shows that the vacant site in the lithium niobate crystallographic frame constructs a useful buffer for Li~+ and Nb~(5+) cations to balance their strong interaction, which is not energetically available for any cation; the Nb~(5+) -site can give a strong effect on the mechanical properties of crystals, which is tremendously important for the crystal growth; the Li~+ -site is closely correlated to the dielectric properties of crystals, which is an active and sensitive lattice site available for various dopants with the valence ranging from + 1 to + 5.
机译：根据各种纯净和掺杂的铌酸锂晶体的晶体学数据，采用鲍林规则，键合价和模型和化学键合方法，了解了铌酸锂晶体的物理性质对晶体学的影响。定量或定性地研究了诸如介电响应（包括主折射率和二阶非线性光学系数），自发极化和自发应变等物理性质。目前的工作表明，铌酸锂晶体框架中的空位可为Li〜+和Nb〜（5+）阳离子构建有用的缓冲剂，以平衡它们之间的强相互作用，而对于任何阳离子而言，能量上均不可用。 Nb〜（5 +）-位对晶体的机械性能有很强的影响，这对晶体的生长至关重要。 Li〜+位点与晶体的介电​​特性密切相关，这是一个活跃且敏感的晶格位点，可用于各种掺杂物，化合价在+1到+5之间。

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