P-T Phase Diagram of LuFe2O4 - Université de Montpellier Accéder directement au contenu
Article Dans Une Revue Crystals Année : 2018

P-T Phase Diagram of LuFe2O4

Résumé

The high-pressure behavior of LuFe2O4 is characterized based on synchrotron X-ray diffraction and neutron diffraction, resistivity measurements, X-ray absorption spectroscopy and infrared spectroscopy studies. The results obtained enabled us to propose a P-T phase diagram. In this study, the low pressure charge-ordering melting could be detected by synchrotron XRD in the P-T space. In addition to the ambient pressure monoclinic C2/m and rhombohedral R(3) over bar m phases, the possible P (1) over bar triclinic phase, the monoclinic high pressure form Pm and metastable modulated monoclinic phases were observed; the latter modulated monoclinic phases were not observed in the present neutron diffraction data. Furthermore, the transition to the Pm phase which was already characterized by strong kinetics is found to be favored at high temperature (373 K). Based on X-ray absorption spectroscopy data the Pm phase, which could be recovered at atmospheric pressure, can be explained by a change in the Fe-local environment from a five-fold coordination to a distorted 5 + 1 one.
Fichier principal
Vignette du fichier
Crystals_8_184.pdf (14.89 Mo) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte
Loading...

Dates et versions

hal-01826289 , version 1 (23-10-2020)

Identifiants

Citer

Maria Poienar, Julie Bourgeois, Christine Martin, Maryvonne Hervieu, François Damay, et al.. P-T Phase Diagram of LuFe2O4. Crystals, 2018, 8 (5), pp.184-1-184-17. ⟨10.3390/cryst8050184⟩. ⟨hal-01826289⟩
413 Consultations
138 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More