Glass fragility and atomic ordering on the intermediate and extended range
The relation between the fragility of glass-forming systems, a parameter which describes many of their key physical characteristics, and atomic scale structure is investigated by using neutron diffraction to measure the topological and chemical ordering for germania, or GeO(2), which is an archetypa...
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| Veröffentlicht in: | Physical review letters 2006-06, Vol.96 (23), p.235502-235502, Article 235502 |
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| container_issue | 23 |
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| container_title | Physical review letters |
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| creator | Salmon, Philip S Barnes, Adrian C Martin, Richard A Cuello, Gabriel J |
| description | The relation between the fragility of glass-forming systems, a parameter which describes many of their key physical characteristics, and atomic scale structure is investigated by using neutron diffraction to measure the topological and chemical ordering for germania, or GeO(2), which is an archetypal strong glass former. We find that the ordering for this and other tetrahedral network-forming glasses at distances greater than the nearest neighbor can be rationalized in terms of an interplay between the relative importance of two length scales. One of these is associated with an intermediate range, the other with an extended range and, with increasing glass fragility, it is the extended range ordering which dominates. |
| doi_str_mv | 10.1103/physrevlett.96.235502 |
| format | Article |
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We find that the ordering for this and other tetrahedral network-forming glasses at distances greater than the nearest neighbor can be rationalized in terms of an interplay between the relative importance of two length scales. 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| issn | 0031-9007 1079-7114 |
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| source | American Physical Society Journals |
| subjects | GERMANIUM OXIDES GLASS MATERIALS SCIENCE MOLECULAR STRUCTURE NEUTRON DIFFRACTION PHYSICAL PROPERTIES |
| title | Glass fragility and atomic ordering on the intermediate and extended range |
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