| Автор | P S Salmon |
| Автор | Jian Liu |
| Дата выпуска | 1994-02-21 |
| dc.description | The topology of liquid Ge<sub>y</sub>Se<sub>1-y</sub> (0<or=y<or=1) alloys, at the compositions y=0.33, 0.4, 0.5 and 1, is studied using neutron diffraction to measure the Bhatia-Thornton number-number partial structure factor S<sub>NN</sub>(kr<sub>1</sub>), where k and r<sub>1</sub> are, respectively, the scattering vector and nearest-neighbour distance in real space. S<sub>NN</sub>(kr<sub>1</sub>) has, for the range 0<or=kr<sub>1</sub><or=10, a prominent three-peak character in the case of the glass-forming melt GeSe<sub>2</sub> (y=0.33). This character changes significantly with increasing y: the so-called first sharp diffraction peak (FSDP) is virtually eliminated at y=0.5, a composition for which the amorphous state is not formed by usual bulk-quenching methods, and the third peak becomes a shoulder to the second at y=1. The concomitant changes on both the short and intermediate real-space length scales are discussed in terms of a break-up of the GeSe<sub>2</sub> network structure. It is found that liquid GeSe is not characterized by a regular octahedral coordination environment but that it is topologically similar to liquid As. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | The relation between the melt topology and glass-forming ability for liquid Ge-Se alloys |
| Тип | paper |
| DOI | 10.1088/0953-8984/6/8/004 |
| Electronic ISSN | 1361-648X |
| Print ISSN | 0953-8984 |
| Журнал | Journal of Physics: Condensed Matter |
| Том | 6 |
| Первая страница | 1449 |
| Последняя страница | 1460 |
| Аффилиация | P S Salmon; Sch. of Phys., East Anglia Univ., Norwich, UK |
| Аффилиация | Jian Liu; Sch. of Phys., East Anglia Univ., Norwich, UK |
| Выпуск | 8 |
