| Автор | A Jorio |
| Автор | P Saint-Grégoire |
| Автор | M A Pimenta |
| Дата выпуска | 2000-11-06 |
| dc.description | Raman experiments were performed on Rb<sub>2</sub>WO<sub>4</sub> crystals, between room temperature and 850 K, including the high-temperature incommensurate phase. The experimental results observed in the incommensurate (T<sub>I</sub> = 746 K) and the lock-in (T<sub>C</sub> = 660 K) phase transitions can be explained by an order-disorder apex model, where the gradual up/down ordering of the WO<sub>4</sub><sup>2-</sup> apexes is responsible for the structural changes. The as-grown sample exhibits a monoclinic-orthorhombic phase transition that is suppressed by heat treatment of the sample, and this result is confirmed by differential scanning calorimetry measurements. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | High-temperature phase transitions in incommensurate Rb<sub>2</sub>WO<sub>4</sub> |
| Тип | paper |
| DOI | 10.1088/0953-8984/12/44/311 |
| Electronic ISSN | 1361-648X |
| Print ISSN | 0953-8984 |
| Журнал | Journal of Physics: Condensed Matter |
| Том | 12 |
| Первая страница | 9307 |
| Последняя страница | 9315 |
| Выпуск | 44 |
