Abstract
An analysis is made of the information provided by the method of isotopic substitution in neutron diffraction on the metal atom coordination environment in M-A-X glasses, where M denotes Ag or Cu, A a Group IVB or VB element, and X a chalcogen. It is found that the M-X coordination number is low (∼ 3-4) but there is no clear correlation between its precise value and whether the material is a semiconductor or fast-ion conductor. When the concentration of M is high it is possible to measure the M-M partial pair distribution function gM-M(r). In those systems for which results are available it is found that, irrespective of the electrical conductivity mechanism, short M-M nearest-neighbour distances are present. However, the first peak in gM-M(r) is more clearly defined in the case of semiconducting glasses.
Original language | English |
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Pages (from-to) | 172-175 |
Number of pages | 4 |
Journal | Journal of Non-Crystalline Solids |
Volume | 205-207 |
Issue number | 1 |
DOIs | |
Publication status | Published - 1 Oct 1996 |
Funding
It is a pleasure to thank the UK Engineering and Physical Sciences Research Council for financial support and Drs Ian Penfold and Chris 3enmore for their substantial contributions to our research programme on M-A-X materials. J.L. also thanks the support of the University of East Anglia, the CVCP and the Great Britain-China Education Trust.
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Ceramics and Composites
- Condensed Matter Physics
- Materials Chemistry