Electronic structure and magnetic properties of FeWO{sub 4} nanocrystals synthesized by the microwave-hydrothermal method

This communication reports that FeWO{sub 4} nanocrystals were successfully synthesized by the microwave-hydrothermal method at 443 K for 1 h. The structure and shape of these nanocrystals were characterized by X-ray diffraction, Rietveld refinement, and transmission electron microscopy. The experime...

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Bibliographic Details
Published in:Materials characterization 2012-11, Vol.73 (Complete)
Main Authors: Almeida, M.A.P., Cavalcante, L.S., Morilla-Santos, C., Filho, P.N. Lisboa, Beltran, A., Andres, J., Gracia, L., Longo, E., INCTMN-Universidade Estadual, Paulista, P.O. Box 355, 14801-907, Araraquara, SP
Format: Article
Language:English
Subjects:
ANTIFERROMAGNETISM
CLUSTER MODEL
CRYSTAL GROWTH
ELECTRONIC STRUCTURE
HYDROTHERMAL SYNTHESIS
IRON TUNGSTATES
MAGNETIC FIELDS
MAGNETIC PROPERTIES
MAGNETIZATION
MATERIALS SCIENCE
MONOCLINIC LATTICES
NANOSTRUCTURES
SPIN
X-RAY DIFFRACTION
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Summary:This communication reports that FeWO{sub 4} nanocrystals were successfully synthesized by the microwave-hydrothermal method at 443 K for 1 h. The structure and shape of these nanocrystals were characterized by X-ray diffraction, Rietveld refinement, and transmission electron microscopy. The experimental results and first principles calculations were combined to explain the electronic structure and magnetic properties. Experimental data were obtained by magnetization measurements for different applied magnetic fields. Theoretical calculations revealed that magnetic properties of FeWO{sub 4} nanocrystals can be assigned to two magnetic orderings with parallel or antiparallel spins in adjacent chains. These factors are crucial to understanding of competition between ferro- and antiferromagnetic behavior. Highlights: Black-Right-Pointing-Pointer Monophasic FeWO{sub 4} nanocrystals were synthesized by the microwave-hydrothermal method. Black-Right-Pointing-Pointer Rietveld refinement and clusters model for monoclinic structure Black-Right-Pointing-Pointer Magnetic properties of FeWO{sub 4} nanocrystals at different temperatures.
ISSN:1044-5803
1873-4189
DOI:10.1016/J.MATCHAR.2012.08.006