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The magnetocaloric effect and heat capacity of ferrimagnetic nanosystems: High-dispersity magnetite

  • Physical Chemistry of Nanoclusters and Nanomaterials
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Abstract

The magnetocaloric effects of aqueous and ethanolic high-dispersity magnetite suspensions and the magnetite magnetic liquid were determined calorimetrically over the temperature range 15–80°C. The temperature dependence of the magnetocaloric effect of suspensions was evidence of the thermal oxidation of magnetite to maghemite. The temperature dependences of the magnetocaloric effect of the magnetic liquid passed extrema related to the second-order magnetic phase transition.

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Authors and Affiliations

  1. Institute of the Solution Chemistry, Russian Academy of Sciences, Ivanovo, Russia

    V. V. Korolev, I. M. Aref’ev & A. G. Ramazanova

Authors
  1. V. V. Korolev
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  2. I. M. Aref’ev
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  3. A. G. Ramazanova
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Additional information

Original Russian Text © V.V. Korolev, I.M. Aref’ev, A.G. Ramazanova, 2007, published in Zhurnal Fizicheskoi Khimii, 2007, Vol. 81, No. 6, pp. 1085–1088.

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Korolev, V.V., Aref’ev, I.M. & Ramazanova, A.G. The magnetocaloric effect and heat capacity of ferrimagnetic nanosystems: High-dispersity magnetite. Russ. J. Phys. Chem. 81, 949–951 (2007). https://doi.org/10.1134/S0036024407060192

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  • DOI: https://doi.org/10.1134/S0036024407060192

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