Structural Studies Of Amorphous Ge-Au Alloys

Edwards, A.M. and Fairbanks, M.C. and Newport, R.J. (1991) Structural Studies Of Amorphous Ge-Au Alloys. Philosophical Magazine B-Physics of Condensed Matter Statistical Mechanics Electronic Optical and Magnetic Properties, 63 (2). pp. 457-463. ISSN 0141-8637. (The full text of this publication is not available from this repository)

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Abstract

In order to understand the structural changes associated with the occurrence of a metal-to-insulator transition in amorphous Ge-Au alloys as the proportion of Au is increased above a critical limit, we have investigated the microstructure as a function of composition. Samples, prepared in the form of thin films by r.f co-sputtering, were studied using both Ge K edge and Au L3 edge extended X-ray absorption fine structure. The results indicate that, for alloys containing less than approximately 20 at.% Au, local modification of the structure occurs; regions of a Ge-Au alloy are embedded in the amorphous Ge host network. As the proportion of Au is increased further, small clusters of Au also appear to be formed. The implications of these results for the interpretation of electrical conductivity data are discussed.

Item Type: Article
Subjects: Q Science
Divisions: Faculties > Science Technology and Medical Studies > School of Physical Sciences > Functional Materials Group
Depositing User: J.M. Smith
Date Deposited: 14 May 2009 13:49
Last Modified: 14 May 2009 13:49
Resource URI: http://kar.kent.ac.uk/id/eprint/15893 (The current URI for this page, for reference purposes)
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