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Origin of the Intrinsic Coercivity Field Variations and Magnetic Study of ε-Fe2O3

  • PHOTOCHEMISTRY AND MAGNETOCHEMISTRY
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Abstract

Origin of the intrinsic coercivity field variations observed by hysteretic measurements established by Nikolic et al. was investigated in detail by ZFC/FC measurements. In this study, magnetic behavior of the samples is further examined by calculation of the ZFC \({{M}_{n}}(T)\) and \({{M}_{n}}(H)\) first derivatives. Performed study showed that the main contribution to the measured coercivity comes from the ε-Fe2O3 particles, characterized by \(Hci = 24~\;{\text{kOe}}\), although both samples posses \({\text{SPM}}\) ε-Fe2O3 fraction. As a result, Hci values of the samples are differed dependent on the quantity of the SPM ε-Fe2O3 particles in the sample. Mechanism of the intrisic coercivity field variations is discussed.

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ACKNOWLEDGMENTS

This work has been supported by the Ministry of Education, Science and Technology Development, Republic of Serbia (project no. III 45015).

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Authors and Affiliations

  1. Laboratory for Theoretical Physics and Condensed Matter Physics, Institute of Nuclear Sciences Vinča, University of Belgrade, Belgrade, Serbia

    Violeta N. Nikolić, Mirjana M. Milić & Vojislav Spasojević

  2. Faculty of Technology and Metallurgy, Innovation Centre, University of Belgrade, 1100, Belgrade, Serbia

    Jelena D. Zdravković

Authors
  1. Violeta N. Nikolić
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  2. Mirjana M. Milić
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  3. Jelena D. Zdravković
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  4. Vojislav Spasojević
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Correspondence to Violeta N. Nikolić.

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Nikolić, V.N., Milić, M.M., Zdravković, J.D. et al. Origin of the Intrinsic Coercivity Field Variations and Magnetic Study of ε-Fe2O3. Russ. J. Phys. Chem. 93, 588–593 (2019). https://doi.org/10.1134/S0036024419030130

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