The structure and magnetic properties of cobalt ferrite nanoparticles synthesized in a system of direct micelles of amphiphiles by means of ion flotoextraction |
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| Authors: | Yu. A. Mirgorod N. A. Borshch V. M. Fedosyuk G. Yu. Yurkov |
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| Affiliation: | 1.Southwest State University,Kursk,Russia;2.Institute of Solid State and Semiconductor Physics,National Academy of Sciences of Belarus, SSPA Scientific and Practical Center for Materials Science,Minsk,Belarus;3.Baikov Institute of Metallurgy and Materials Science,Russian Academy of Sciences,Moscow,Russia |
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| Abstract: | A method for obtaining nanoparticles in a system of direct micelles of amphiphiles using ion flotoextraction for concentrating ions from diluted water solutions is developed. Nanoparticles of the composition CoFe2O4 with a structure close to spinel are obtained. It is established that the particles consist of two components: well-formed phases of cobalt ferrite CoFe2O4 and its amorphous analog. It is shown that the nanoparticles have a maximum size distribution ranging from 4 to 6 nm; on a carbon substrate, they self-organize into a periodic colloidal structure. It is concluded that nanosized CoFe2O4 powder has a blocking temperature of about 45 K, a magnetic moment of about 0.85–0.9μB at a temperature of 0 K, and the Neöl temperature lies in the range of 110 to 250 K. |
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