Monodisperse spherical nanoparticles of MIIFe III2 O4 (M = Mn, Co, Ni) with controlled diameter (5-20 nm) were synthesized by solvothermal decomposition of [MIIFe III2 O(CH3CO2)6(H2O)3] complexes in poly- and tetraethylene glycol. The samples were studied by XRD, TEM, and SQUID magnetometry. The nanoparticles have superparamagnetic behavior. The blocking temperature, magnetization, and magnetic anisotropy barrier decrease, while the magnetic anisotropy constant increases with decreasing particle size.
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This work was carried out with the financial support of the Joint Targeted Basic Research Program of the National Academy of Sciences of Ukraine “Fundamental problems of nanostructural systems, nanomaterials and nanotechnology” (Project No. 42/14-N).
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Translated from Teoreticheskaya i Éksperimental’naya Khimiya, Vol. 50, No. 4, pp. 227-231, July-August, 2014.
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Vasylenko, I.V., Gavrilenko, K.S., Kotenko, I.E. et al. Solvothermal Preparation and Magnetic Properties of Monodisperse Superparamagnetic Nanosized Ferrites MFe2O4 (M = Mn, Co, Ni). Theor Exp Chem 50, 226–231 (2014). https://doi.org/10.1007/s11237-014-9370-x
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DOI: https://doi.org/10.1007/s11237-014-9370-x