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Z. LAZAREVIĆ1,* , Lj. ANDJELKOVIĆ2, M. ŠULJAGIĆ2, A. MILUTINOVIĆ1, M. ĆURČIĆ1, J. TRAJIĆ1, N. PAUNOVIĆ1, M. ROMČEVIĆ1, B. HADŽIĆ1, N. ROMČEVIĆ1
Nanocrystalline CoFe2O4 has been synthesized by various synthesis methods. The obtained monodomain nanoparticles are similar in sizes (15.8-19 nm), but with different internal stresses, size distributions and cation inversion coefficients (0.51 - 0.90) due to different synthesis routes. The structure and cation distribution are investigated by XRD diffraction analysis, Raman and FIR spectroscopy. Measurement of magnetization, i.e. coercivity, enable the calculation of the anisotropy coefficient K1 = (3.6-5.12)·105 J cm-3 , which is very high in cobalt ferrite. The anisotropy coefficient directly depends on the nanoparticle size. It has been shown that magnetization linearly depends on the cation inversion, except in the sample with the largest nanoparticles (19 nm), where the more regular crystal structure prevails and higher values of magnetization were obtained. The average magnetic moments at 300 K are: μFe = 3.6μB and μCo = 2.5μB. It is obvious that with small adjustments in the synthesis, desirable nanoparticle properties can be obtained.
CoFe2O4, XRD, Raman, Far-infrared spectroscopy, Magnetic measurements.
Z. LAZAREVIĆ, Lj. ANDJELKOVIĆ, M. ŠULJAGIĆ, A. MILUTINOVIĆ, M. ĆURČIĆ, J. TRAJIĆ, N. PAUNOVIĆ, M. ROMČEVIĆ, B. HADŽIĆ, N. ROMČEVIĆ, Vibrational and magnetic properties of nano-sized CoFe2O4 obtained by various synthesis techniques: a comparative study, Optoelectronics and Advanced Materials - Rapid Communications, 17, 5-6, May-June 2023, pp.247-254 (2023).
Submitted at: Dec. 6, 2022
Accepted at: June 6, 2023
Optoelectronics and Advanced Materials - Rapid Communications
(2022): 0.5 - 2022 Journal Citation Reports (Clarivate Analytics, 2023)
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