| Autor: |
Masaki Sakurai, Yutaka Murakami, Takeshi Usuki, S. Kohara |
| Rok vydání: |
2007 |
| Předmět: |
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| Zdroj: |
Materials Science and Engineering: A. :544-547 |
| ISSN: |
0921-5093 |
| Popis: |
Neutron and high-energy X-ray diffraction measurements have been carried out at KENS-KEK and SPring-8, in order to investigate detailed structures of amorphous GeSe 2 prepared by the rapid quenching method. Considerable intermediate-range ordering is evident from the presence of a first sharp diffraction peak at low magnetides of the scattering vector. Well-defined first and second peaks are found at around 2.36 and 3.90 A in the pair distribution function g ( r ). A small shoulder related to the existence of edge-sharing tetrahedral units is observed at a shorter r side of the second peak in g ( r ). Partial distribution functions, partial structure factors and bond-angle distributions can be obtained by Reverse Monte Carlo simulation. Results suggest that there are homo-polar bonds in tetrahedral structural units, and then the glass network is constructed by not only corner-sharing but also edge-sharing tetrahedra. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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