Photorefractive properties of LiNbO3:Zn crystals related to the defect structure

被引：42

作者：

Volk, T

Maximov, B

Chernaya, T

Rubinina, N

Wöhlecke, M ^{[1
]}

Simonov, V

机构：

[1] Univ Osnabruck, Fachbereich Phys, D-49069 Osnabruck, Germany

[2] Russian Acad Sci, Inst Crystallog, Moscow, Russia

[3] Moscow State Univ, Moscow, Russia

来源：

APPLIED PHYSICS B-LASERS AND OPTICS | 2001年 / 72卷 / 06期

关键词：

D O I：

10.1007/s003400100548

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

LiNbO3:Zn single crystals and powders were studied by precise X-ray diffraction methods. Structural refinement yielded new models of the intrinsic defect structure valid for different Zn concentration ranges. For concentrations up to 7 at. % in the crystal, Zn ions incorporate onto Li sites; at higher concentrations Zn ions are found on both Li and Nb sites. Photorefractive properties of LiNbO3:Zn are discussed in the context of the deduced defect models. A smooth increase in the photoconductivity up to 7 at. % Zn is accounted for by a decrease of Nb antisites. Steeper growth of the photoconductivity at higher Zn concentrations is related to vanishing Li vacancies.

引用

页码：647 / 652

页数：6

共 31 条

[1] DEFECT STRUCTURE DEPENDENCE ON COMPOSITION IN LITHIUM-NIOBATE [J].