We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
P-T Phase Diagram of LuFe2O4.
- Authors
Poienar, Maria; Bourgeois, Julie; Martin, Christine; Hervieu, Maryvonne; Damay, Françoise; Garbarino, Gaston; Hanfland, Michael; Hansen, Thomas; Baudelet, François; Bantignies, Jean Louis; Hermet, Patrick; Haines, Julien; Rouquette, Jérôme
- Abstract
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 <italic>P</italic>-<italic>T</italic> phase diagram. In this study, the low pressure charge-ordering melting could be detected by synchrotron XRD in the <italic>P</italic>-<italic>T</italic> space. In addition to the ambient pressure monoclinic <italic>C</italic>2/<italic>m</italic> and rhombohedral <italic>R</italic> 3 ¯ <italic>m</italic> phases, the possible <italic>P</italic> 1 ¯ triclinic phase, the monoclinic high pressure form <italic>Pm</italic> 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 <italic>Pm</italic> 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 <italic>Pm</italic> 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.
- Subjects
LUTETIUM compounds; PHASE diagrams; SYNCHROTRON radiation; CRYSTALLOGRAPHY
- Publication
Crystals (2073-4352), 2018, Vol 8, Issue 5, p184
- ISSN
2073-4352
- Publication type
Article
- DOI
10.3390/cryst8050184