On the substitution site of Cr and Fe in LiNbO3: An EXAFS study

被引：14
|
作者：
Corradi, G
Chadwick, AV
West, AR
Cruickshank, K
Paul, M
机构：
[1] UNIV KENT,CHEM LAB,CANTERBURY CT2 7NH,KENT,ENGLAND
[2] UNIV ABERDEEN,DEPT CHEM,ABERDEEN AB9 2VE,SCOTLAND
[3] UNIV OSNABRUCK,FB PHYS,D-49069 OSNABRUCK,GERMANY
来源：
RADIATION EFFECTS AND DEFECTS IN SOLIDS | 1995年 / 134卷 / 1-4期
关键词：
crystal defects; impurity centres; transition elements; lithium niobate; EXAFS;
D O I：
10.1080/10420159508227218
中图分类号：
TL [原子能技术]; O571 [原子核物理学];
学科分类号：
0827 ; 082701 ;
摘要：
K-edge EXAFS spectra of 5 molar% Cr or Fe have been observed in LiNbO3 and also in Mg co-doped samples. The results in congruent LiNbO3 can be interpreted in terms of a relaxed Li substitution model, however, in the case of Cr, the formation of pairs occupying Li and Nb sites seems also to be important. In stoichiometric or Mg-containing samples Fe is partly displaced to the Nb site while for Cr the dominating process seems to be the formation of aggregates with the participation of Mg.
引用
收藏
页码：219 / 222
页数：4
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