Cu+ and OH- pairs defects interaction in NaF crystals

被引：2

作者：

Fabris, JL ^{[1
]}

Muller, M ^{[1
]}

Hernandes, AC ^{[1
]}

SiuLi, M ^{[1
]}

Kapphan, S ^{[1
]}

机构：

[1] UNIV OSNABRUCK,FB PHYS,D-49069 OSNABRUCK,GERMANY

来源：

RADIATION EFFECTS AND DEFECTS IN SOLIDS | 1995年 / 134卷 / 1-4期

基金：

巴西圣保罗研究基金会;

关键词：

alkali halides; NaF; OH-/Cu+ impurities;

D O I：

10.1080/10420159508227247

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：

The presence of Cu+ in OH- doped NaF crystal results in several new infrared absorption bands with similar to 0.2 cm(-) halfwidth at 100 K, and their relative intensities are strongly impurity concentration dependent. Their assignments are not evident and are mostly attributed to different vibrational internal modes of the molecular OH- perturbed by neighboring Cu+ ions.(1) We report the results of the temperature dependence of several OH- sidebands around the 3737.8 cm(-1) 'free' OH- stretching mode. The temperature dependence reveals a different behaviour from already known OH- quasi free rotor in several cesium halides.(2) For the temperature range from 100 to 300 K, the free OH- halfwidth shows a T-2 behaviour. While for three chosen absorption sidebands are determined to be T-1.6, T-1.8 and T-2.5. The lack of observable thermally stimulated depolarization current and electric field induced dichroism(3) indicates that the OH- is frozen-in, so it is also the same with the OH--Cu+ pairs.

引用

页码：353 / 356

页数：4

共 5 条

[1] INNER VIBRATIONAL-MODES AND ANHARMONICITY OF MG-OH- COMPLEXES IN NAF SINGLE-CRYSTALS [J].