| Автор | K Rotereau |
| Автор | Ph Daniel |
| Автор | A Desert |
| Автор | J Y Gesland |
| Дата выпуска | 1998-02-16 |
| dc.description | (samarium fluoride) exhibits orthorhombic symmetry (space group Pnma; type) at room temperature and rhombohedral symmetry (space group type) at high temperature. In this paper we describe a study of the structural phase transition mechanism occurring in this compound performed by means of differential thermal analysis, x-ray diffraction and Raman scattering. The transition temperature was determined to be and the first-order character of the orthorhombic-rhombohedral phase transition was confirmed. The crystal structure of was refined in the two phases using a Rietveld powder diffraction method. The correlation between the coordination polyhedra appropriate to the two structure types has been established and a proposed transition mechanism is described in this paper. Moreover, a full vibrational investigation of both phases of is presented together with a group theory analysis. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | The high-temperature phase transition in samarium fluoride, : structural and vibrational investigation |
| Тип | paper |
| DOI | 10.1088/0953-8984/10/6/026 |
| Electronic ISSN | 1361-648X |
| Print ISSN | 0953-8984 |
| Журнал | Journal of Physics: Condensed Matter |
| Том | 10 |
| Первая страница | 1431 |
| Последняя страница | 1446 |
| Аффилиация | K Rotereau; Laboratoire de Physique de l'Etat Condensé, UPRES-A No 6087, Université du Maine, avenue Olivier Messiaen, 72085 Le Mans, Cédex 9, France |
| Аффилиация | Ph Daniel; Laboratoire de Physique de l'Etat Condensé, UPRES-A No 6087, Université du Maine, avenue Olivier Messiaen, 72085 Le Mans, Cédex 9, France |
| Аффилиация | A Desert; Laboratoire de Physique de l'Etat Condensé, UPRES-A No 6087, Université du Maine, avenue Olivier Messiaen, 72085 Le Mans, Cédex 9, France |
| Аффилиация | J Y Gesland; Laboratoire de Physique de l'Etat Condensé, UPRES-A No 6087, Université du Maine, avenue Olivier Messiaen, 72085 Le Mans, Cédex 9, France |
| Выпуск | 6 |
