Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1800930 | Journal of Magnetism and Magnetic Materials | 2010 | 6 Pages |
Abstract
The magnetic properties of chalcogenide spinel CuCr2Se4 nanocrystals have been studied as a function of crystallite size (15-30Â nm). A solution-based method is used for the facile synthesis of the nanocrystals with good size control. They have close to cubic morphology with a narrow size distribution and exhibit superparamagnetic behavior at room temperature. The Curie temperature and saturation magnetization of the nanocrystals are lower as compared with the bulk and decrease with decreasing nanocrystal size. A similar trend is observed in the paramagnetic state for the Curie-Weiss temperature and effective magnetic moment. The low temperature magnetization behavior can be qualitatively explained by spin glass dynamics.
Keywords
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Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
G.M. Tsoi, L.E. Wenger, Y.-H.A. Wang, A. Gupta,