Studies of disorder in Cd1-xPbxF2 mixed crystals

被引：1

作者：

Netshisaulu, TT

Melle-Franco, M

Chadwick, AV

Ngoepe, PE

机构：

[1] Univ North, Mat Modelling Ctr, ZA-0727 Sovenga, South Africa

[2] Univ Kent, Dept Chem, Canterbury CT2 7NH, Kent, England

[3] CSIR, Div Mat Sci & Technol, ZA-0001 Pretoria, South Africa

来源：

RADIATION EFFECTS AND DEFECTS IN SOLIDS | 1999年 / 149卷 / 1-4期

关键词：

EXAFS; PbF2; CdF2; Cd0.4Pb0.6F2; Cd1-xPbxF2;

D O I：

10.1080/10420159908230162

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 local environments of Cd and Ph cations in Cd1-xPbxF2 as a function of x have been measured by means of extended X-ray absorption fine structure (EXAFS). The compositional dependence of disorder has been studied and reveals that the second shell structures for the Cd- and Pb-edges decrease with concentration for x < 0.6 and are completely washed out at x = 0.6. An increase in the second shell structure is observed as x increases from 0.6. However, the high values of the Debye-Waller factors on the Pb edges suggest a high degree of disorder around the Pb cations in the whole of Cd1-xPbxF2 mixed crystals.

引用

页码：243 / 248

页数：6

共 50 条

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