Journal
CRYSTENGCOMM
Volume 14, Issue 17, Pages 5373-5376Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2ce25294e
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Funding
- Russian Foundation of Basic Research [10-03-00964, 11-02-12170-ofi-m-2011]
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The structure of an epitaxial thin film of cobalt-doped hexagonal LuFeO3 was studied by aberration-corrected high-resolution scanning transmission electron microscopy. The distribution maps of the chemical elements in the film were obtained using atomically resolved energy-dispersive X-ray spectroscopy. The study showed that cobalt ions have a strong tendency towards forming double layers of (Fe/Co)O-2.5 between the Lu-O layers in a hexagonal structure. A significantly smaller amount of cobalt is found in single layers of FeO1.5, suggesting the presence of a trigonal-bipyramidal coordination of cobalt. The hexagonal LuFeO3 structure contains numerous reconstructed stacking faults that represent intergrown structural fragments of LuFe2 - xCoxO4. Magnetization measurements revealed a decrease in the magnetic transition temperature of the LuFe0.7Co0.3O3 thin film compared to those of the parent hexagonal LuFeO3 and LuFe2 - xCoxO4 forms.
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