| Titre : | Structural evolution and physical properties of Bi1−xGdxFeO3 ceramics (2011) |
| Auteurs : | J.B. Li, Auteur ; G.H. Rao, Auteur ; Xiao, Y., Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Acta materialia (Vol. 58 N° 10, Juin 2010) |
| Article en page(s) : | pp. 3701–3708 |
| Note générale : | Métallurgie |
| Langues : | Anglais |
| Tags : | Bi-based magnetoelectric perovskites Crystal structure Phase transformation X-ray diffraction |
| Résumé : | The crystal structure and physical properties of Bi1−xGdxFeO3 ceramics with x ≤ 0.5 have been studied by X-ray diffraction, differential scanning calorimetry, dielectric and magnetic measurements. Bi1−xGdxFeO3 compounds crystallize at room temperature in R3c structure for x < 0.08 and in Pbnm structure for x ≥ 0.3. The R3c phase transforms to the Pbnm phase as temperature increases. Temperature-dependent dielectric response and low-temperature X-ray diffraction indicate a phase transition of the Pbnm phase at low-temperature. Detailed structural analysis indicates that the interaction between Bi and O plays an important role in the evolution of structure and physical properties. A phase diagram is constructed to illustrate the physical property–composition–temperature relations. |
| DEWEY : | 669 |
| ISSN : | 1359-6454 |
| En ligne : | http://www.sciencedirect.com/science/article/pii/S1359645410001527 |
