Journal
MATERIALS LETTERS
Volume 276, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.matlet.2020.128210
Keywords
Nanocrystalline materials; Magnetic materials; Nanoparticles; Nanoclusters; Diffusion; Cobalt ferrite
Funding
- Russian Foundation for Fundamental Research [17-53-560025]
- Ministry of Science and Higher Education of the Russian Federation in the framework of Increase Competitiveness Program of NUST MISiS [K22019-011]
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Series of CoxFe3-xO4 with x = 0.0, 0.5 and 1.0 were synthesized by novel seed-mediated method in glycol media. Nanoparticles gradually change their structure from monocrystalline seeds of 6-7 nm size to polycrystalline nanoclusters of 26-33 nm size while crystallite size grows from 5 to 6 nm to 8-10 nm. All series of initial seeds as well as subsequent iron oxide nanoparticles show superparamagnetic behavior whereas other 1st and 2nd series with x = 0.5 and 1.0 show ferrimagnetic behaviour. Coercitive force of Co0.5Fe2.5O4 have comparable or even higher values than CoFe2O4 while saturation magnetization value close to iron oxide samples of same size. The proposed method may be perspective for synthesis of ferrites with controlled size, structure and Co to Fe ratio. (C) 2020 Elsevier B.V. All rights reserved.
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