Grain Size Control of the Magnetic Nanoparticles by Solid State Route Modification
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The CoFe2O4 and NiFe2O4 nanoparticles were synthesized exploiting a co-precipitation method and afterward calcinated at 400 °C through two different experimental apparatus: a conventional muffle and rotatory oven. X-ray diffraction (XRD) analysis revealed that nanocrystalline ferrites grew with a face center cubic structure (fcc) and Fd3m symmetry space group. XRD, transmission electron microscopy, and magnetic measurements confirmed the compositional homogeneity and the narrow size particle distribution (6-8 nm) of the sample thermally treated in a rotary oven, in all likelihood due to the sample’s constant turning movement. The size of the magnetic particles is extremely important and influences the choice of a potential technological application. For this reason, our study emerges as a new and simple innovating procedure to control the size of magnetic nanoparticles.
KeywordsCoFe2O4 magnetic nanoparticles NiFe2O4 size grain control
The support from CAPES, Funcap, and CNPq (Brazilian agencies); Fondecyt 1110252; Millennium Science Nucleus, Basic and Applied Magnetism Grant No. P10-061-F; and CONICYT BASAL CEDENNA FB0807 (Chilean agencies) is gratefully acknowledged.
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