Synthesis and Physicochemical Properties of MnxFe3–xO4 Solid Solutions

Keywords: solid solution, magnetic nanoparticles, spinel, specific magnetization.


Ferrimagnetic nanoparticles are used in biotechnology (as drug carriers, biosensors, elements of diagnostic sets, contrast agents for magnetic resonance imaging), catalysis, electronics, and for the production of magnetic fluids and magnetorheological suspensions, etc. The use of magnetic nanoparticles requires enhanced magnetic characteristics, in particular, high saturation magnetisation.
The aim of our study was to obtain single-phased magnetic nanoparticles of MnxFe3–xO4 solid solutions at room temperature. We also studied the dependence of the changes in their structure, morphology, and magnetic properties on the degree of substitution in order to determine the range of the compounds with the highest magnetisation value.
A number of powders of Mn-substituted magnetite MnxFe3–xO4 (x = 0 – 1.8) were synthesized by means of co-precipitation from aqueous solutions of salts. The structural and micro-structural features and magnetic properties of the powders were studied using magnetic analysis, X-ray diffraction, transmission electron microscopy, and IR spectroscopy.
The X-ray phase analysis and IR spectroscopy confirm the formation of single-phase compounds with cubic spinel structures. The maximum increase in saturation magnetization as compared to non-substituted magnetite was observed for Mn0.3Fe2.7O4 (Ms = 68 A·m2·kg–1 at 300 K and Ms = 85 A·m2·kg–1 at 5 K). This is associated with the changes in the cation distribution between the tetrahedral and octahedral cites.
A method to control the magnetic properties of magnetite by the partial replacement of iron ions in the magnetite structure with manganese has been proposed in the paper. The study demonstrated that it is possible to change the magnetisation and coercivity of powders by changing the degree of substitution. The maximum magnetisation corresponds to the powder Mn0.3Fe2.7O4. The nanoparticles obtained by the proposed method have a comparatively high specific magnetisation and a uniform size distribution. Therefore the developed materials can be used for the production of magnetorheological fluids
and creation of magnetically controlled capsules for targeted drug delivery and disease diagnostics in biology and medicine (magnetic resonance imaging).




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Author Biographies

Alina S. Korsakova, Research Institute for Physical Chemical Problems of the Belarusian State University, 14 Leningradskaya str., Minsk 220006, Belarus

intern, research fellow,
Research Institute for Physical Chemical Problems of
the Belarusian State University, Minsk, Republic of
Belarus; e-mail:

Dzmitry A. Kotsikau, Belarusian State University, 4 Nezavisimosty prosp., Minsk 220030, Belarus

PhD in Chemistry, Associate
Professor, Belarusian State University, Minsk, Republic
of Belarus; e-mail:

Yulyan S. Haiduk, Belarusian State University, 4 Nezavisimosty prosp., Minsk 220030, Belarus

research fellow, Belarusian State
University, Minsk, Republic of Belarus; e-mail: j_

Vladimir V. Pankov, Belarusian State University, 4 Nezavisimosty prosp., Minsk 220030, Belarus

DSc in Chemistry, Professor,
Head of the Department of Physical Chemistry,
Belarusian State University, Minsk, Republic of
Belarus; e-mail:

How to Cite
Korsakova, A. S., Kotsikau, D. A., Haiduk, Y. S., & Pankov, V. V. (2020). Synthesis and Physicochemical Properties of MnxFe3–xO4 Solid Solutions. Kondensirovannye Sredy I Mezhfaznye Granitsy = Condensed Matter and Interphases, 22(4), 466-472.