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Magneto-Optical Effects in Colloidal Solutions of Barium Hexaferrite

  • Physicochemical Studies of Systems and Processes
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Abstract

Hydrothermal synthesis was used to obtain lamellar magnetic particles of barium hexaferrite, and colloidal solutions were prepared on their basis. Magneto-optical effects in colloid solutions of barium hexaferrite were examined. It was found that the aqueous colloidal solution of coarse planar particles of barium hexaferrite is a magneto-optical medium that is nearly two orders of magnitude more effective than the colloid formed from isometric cobalt ferrite particles. It was shown that measuring the frequency dependence of the magneto-optical effects and approximating the experimental data with the Debye function makes it possible to find the frequency f0 characteristic of the given colloid and to calculate the characteristic size of particles (or aggregates) creating the optical anisotropy in the colloid under the action of a magnetic field. A dichroism is observed in the aqueous colloid formed by coarse planar barium hexaferrite particles. This phenomenon is due to the change in the light scattering on coarse particles upon their orientation by a magnetic field.

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Authors and Affiliations

  1. Institute of Technical Chemistry, Perm Federal Research Center, Ural Branch, Russian Academy of Sciences, Perm, Russia

    S. N. Lysenko & S. A. Astaf’eva

  2. Institute of Continuous Media Mechanics, Perm Federal Research Center, Ural Branch, Russian Academy of Sciences, Perm, Russia

    A. V. Lebedev

  3. Horia Hulubei National Institute of Physics and Nuclear Engineering, Bucharest–Magurele, Romania

    M. Balasoiu

Authors
  1. S. N. Lysenko
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  2. A. V. Lebedev
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  3. S. A. Astaf’eva
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  4. M. Balasoiu
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Corresponding author

Correspondence to S. A. Astaf’eva.

Additional information

Original Russian Text © S.N. Lysenko, A.V. Lebedev, S.A. Astaf’eva, M. Balasoiu, 2018, published in Zhurnal Prikladnoi Khimii, 2018, Vol. 91, No. 10, pp. 1388−1395.

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Lysenko, S.N., Lebedev, A.V., Astaf’eva, S.A. et al. Magneto-Optical Effects in Colloidal Solutions of Barium Hexaferrite. Russ J Appl Chem 91, 1574–1580 (2018). https://doi.org/10.1134/S1070427218100026

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  • DOI: https://doi.org/10.1134/S1070427218100026

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