Journal
MATERIALS
Volume 15, Issue 3, Pages -Publisher
MDPI
DOI: 10.3390/ma15031048
Keywords
phase transitions; structural phase stability; LuFeO3; X-ray diffraction; solid solutions
Categories
Funding
- European Union [778070-TransFerrH2020-MSCA-RISE-2017]
- BRFFR [T21RM-040]
- RFBR [20-52-04011]
- Ministry of Science and Higher Education of the Russian Federation [o075-15-2020926]
- FCT/MEC [UIDB/50011/2020, UIDP/50011/2020]
- FEDER
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The structural state and crystal structure of Lu(1-x)ScxFeO3 compounds were investigated, and it was found that chemical doping with Sc ions led to a structural phase transition and the stabilization of a non-perovskite phase.
The structural state and crystal structure of Lu(1-x)ScxFeO3 (0 <= x <= 1) compounds prepared by a chemical route based on a modified sol-gel method were investigated using X-ray diffraction, Raman spectroscopy, as well as scanning electron microscopy. It was observed that chemical doping with Sc ions led to a structural phase transition from the orthorhombic structure to the hexagonal structure via a wide two-phase concentration region of 0.1 < x < 0.45. An increase in scandium content above 80 mole% led to the stabilization of the non-perovskite bixbyite phase specific for the compound ScFeO3. The concentration stability of the different structural phases, as well as grain morphology, were studied depending on the chemical composition and synthesis conditions. Based on the data obtained for the analyzed samples, a composition-dependent phase diagram was constructed.
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