Netshisaulu, T.T. and Melle-Franco, M. and Chadwick, A.V. and Ngoepe, P.E. (1999) Studies of disorder in Cd1-xPbxF2 mixed crystals. In: 8th Europhysical Conference on Defects in Insulating Materials (EURODIM98), 06-11 July, 1998 , Keele, England.
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Abstract
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.
| Item Type: | Conference or workshop item (Paper) |
|---|---|
| Uncontrolled keywords: | EXAFS; PbF2; CdF2; Cd0.4Pb0.6F2; Cd1-xPbxF2 |
| Subjects: | Q Science > Q Science (General) |
| Divisions: | Faculties > Science Technology and Medical Studies > School of Physical Sciences |
| Depositing User: | I.T. Ekpo |
| Date Deposited: | 02 May 2009 21:14 |
| Last Modified: | 02 May 2009 21:14 |
| Resource URI: | http://kar.kent.ac.uk/id/eprint/16957 (The current URI for this page, for reference purposes) |
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