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Mössbauer and Magnetic Studies of Co0.5Mn0.5Fe2O4 and Mn0.1Mg0.2Co0.7 Fe2O4 Nanoferrites

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Abstract

We report the magnetic properties of Mn0.5Co0.5Fe2O4 and Mn0.1Mg0.2Co0.7Fe2O4 nanoferrites. The compounds were synthesized by a glycol-thermal method with average particle sizes of about 13 nm and 8 nm, respectively. The Mössbauer measurements were done at 300 K. The distribution of cations between tetrahedral (A) and octahedral (B) sites is investigated. The Mössbauer spectra indicate ferrimagnetic behavior of the compound. Field cooled (FC) and zero field cooled (ZFC) magnetizations were performed by a Superconducting Quantum Interference Device (SQUID) magnetometer from 4–380 K. Variation of the magnetizations with the applied fields (up to 50 kOe) were recorded at isothermal temperatures 4, 50, 100, 200 and 300 K. An increase in FC magnetization is observed with increasing applied field. This is explained based on superparamagnetic behavior of the particles.

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Authors and Affiliations

  1. School of Physics, University of KwaZulu-Natal, P/Bag X54001, Durban, 4000, South Africa

    H. M. I. Abdallah & T. Moyo

  2. Department of Physics, University of Free State, P/Bag X13, Phuthaditjhaba, 9866, South Africa

    J. Z. Msomi

  3. Institute of Inorganic Chemistrÿ, AS CR, v.v.i., 250 68, Husinec-Řež 1001, Czech Repub

    A. Lančok

Authors
  1. H. M. I. Abdallah
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  2. J. Z. Msomi
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  3. T. Moyo
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  4. A. Lančok
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Correspondence to H. M. I. Abdallah.

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Abdallah, H.M.I., Msomi, J.Z., Moyo, T. et al. Mössbauer and Magnetic Studies of Co0.5Mn0.5Fe2O4 and Mn0.1Mg0.2Co0.7 Fe2O4 Nanoferrites. J Supercond Nov Magn 25, 2619–2623 (2012). https://doi.org/10.1007/s10948-011-1230-5

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  • DOI: https://doi.org/10.1007/s10948-011-1230-5

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