Publication Date:
2012-07-05
Description:
Cobalt tungstate (CoWO 4 ) nanocrystals with an average size of 20–50 nm were synthesized via a template- or surfactant-free hydrothermal route. The crystal structure and morphology of the as-synthesized CoWO 4 sample were characterized by X-ray diffraction, scanning electron microscopy and transmission electron microscopy. Magnetic measurements on the as-synthesized CoWO 4 nanocrystals indicate a Néel temperature ( T N ) of ∼40 K. This lower T N may be a result of the nanostructured particles that reduce the exchange coupling. The new synthetic route presented in this paper has potential applications to fabricate other metal tungstates (MWO 4 ) materials.
Print ISSN:
0232-1300
Electronic ISSN:
1521-4079
Topics:
Geosciences
,
Physics
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