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Synthesis and Characterization of FePt/NiO Core–Shell Nanoparticles

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Abstract

Monodisperse FePt nanoparticles were successfully synthesized using the chemical polyol process. Annealing at the high temperatures is required to achieve the hard ferromagnetic behavior with L10 phase. Annealing causes the surfactant surrounding particles to be decomposed. Under such circumstances, FePt particles are agglomerated, and their size increases. In this research, NiO oxide particle with a high melting point was used for the first time as the shell around FePt core particles to prevent agglomeration. As a result, coercivity, Hc, of FePt and FePt/NiO nanoparticles after annealing at 750 °C are equal to 10 and 7 kOe, respectively.

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Acknowledgments

This work was supported by the Physics Research Center, Science & Research Branch at Islamic Azad University. The authors would like to thank North-Eastern Hill University, Shillong-793022, India (http://www.nehu.ac.in/Services/SAIF) for transmission electron microscopy analysis of core–shell nanoparticles. Also, the authors wish to thank Islamic Azad University, Ardabil Branch.

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Authors and Affiliations

  1. Department of Physics, Science and Research Branch, Islamic Azad University, P.O. Box 14665-678, Tehran, Iran

    Hossein Zeynali & Seyed Ali Sebt

  2. Magnetic and Superconducting Research Lab, Department of Physics, University of Birjand, Birjand, Iran

    Hadi Arabi

  3. Department of Physics, Islamic Azad University, Ardabil Branch, Ardabil, Iran

    Hossein Akbari

  4. Center for Nanoscience and Technology, IST, Jawaharlal Nehru Technological University, Hyderabad, 500085, Andhra Pradesh, India

    Seyed Mostafa Hosseinpour-Mashkani & K. Venkateswara Rao

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  1. Hossein Zeynali
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  2. Seyed Ali Sebt
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  3. Hadi Arabi
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  4. Hossein Akbari
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  5. Seyed Mostafa Hosseinpour-Mashkani
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  6. K. Venkateswara Rao
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Correspondence to Hossein Zeynali.

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Zeynali, H., Sebt, S.A., Arabi, H. et al. Synthesis and Characterization of FePt/NiO Core–Shell Nanoparticles. J Inorg Organomet Polym 22, 1314–1319 (2012). https://doi.org/10.1007/s10904-012-9765-x

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  • DOI: https://doi.org/10.1007/s10904-012-9765-x

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