Studies of disorder in Cd1-xPbxF2 mixed crystals

Netshisaulu, T.T. and Melle-Franco, Manuel and Chadwick, Alan V. and Ngoepe, Phuti 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. (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

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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: 15 Jul 2014 14:01
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