Effect of optical damage resistant dopants on the dielectric properties of LiNbO3: Insight from broadband impedance spectroscopy and Raman scattering

被引：9

作者：

Cochard, Charlotte ^{[1
,2
]}

Guennou, Mael ^{[1
]}

Spielmann, Thiemo ^{[3
]}

van Hoof, Niels ^{[4
]}

Halpin, Alexei ^{[4
]}

Granzow, Torsten ^{[1
]}

机构：

[1] LIST, MRT Dept, L-4362 Esch Sur Alzette, Luxembourg

[2] Queens Univ Belfast, Sch Math & Phys, Ctr Nanostruct Media, Belfast BT7 1NN, Antrim, North Ireland

[3] ZAE Weiergewan, IEE SA, 11 Rue Edmond Reuter, L-5326 Contern, Luxembourg

[4] Dutch Inst Fundamental Energy Res DIFFER, De Zaale 20, NL-5612 AJ Eindhoven, Netherlands

来源：

JOURNAL OF APPLIED PHYSICS | 2018年 / 123卷 / 15期

关键词：

DOPED LITHIUM-NIOBATE; DEFECT STRUCTURE; FERROELECTRIC MATERIALS; REFRACTIVE-INDEXES; MG ION; CRYSTALS; MECHANISM; ZN; DEPENDENCE;

D O I：

10.1063/1.5021758

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Optical damage limits the application range of congruent LiNbO3. This problem is commonly overcome by adding optical-damage-resistant cations. Here, the influence of doping with optical-damage-resistant Mg and Zn on the ionic and piezoelectric contributions to the dielectric permittivity is investigated in a broad frequency range (1 mHz-2 THz). It is shown that the two dopants have radically different influences on the variation of ionic permittivity with doping, in spite of their similarities with respect to the crystallographic structure. Raman spectroscopy reveals that the difference in permittivity can be traced to the effect of Mg and Zn doping on the susceptibility of the phonon modes. Both observations point to differences in the defect incorporation mechanisms. Published by AIP Publishing.

引用

页数：7

共 37 条

[1] Influence of Zn doping on electrooptical properties and structure parameters of lithium niobate crystals [J].