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Detection of Single-Domain Co2FeAl Nanoparticles Using First-Order Reversal Curve Method

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Abstract

Half-Heusler nanostructures of Co2FeAl alloys, synthesized via coprecipitation route, were found to contain both hard- and soft-phases magnetic grains, mapped using first-order reversal curves (FORCs) diagrams. The obtained results confirmed that these powders are highly interacting as a single-domain magnetizing system. A significant dependence of the morphology and particle size on the annealing rate was represented by scanning electron microscopy (SEM), transmission electron microscopy (TEM), and high-resolution TEM images. The presence of the strong magnetizing interaction between the nanoparticles led to the formation of chain-like structure stabilized by PVP polymer. By increasing the annealing rate from 278.15 K/min to 288.15 K/min (5 °C/min to 15 °C/min), the grain shape changed from long nanochain to nonuniform agglomerated grains. Additionally, the magnetic characteristics of the prepared alloys were found to be affected by tuning the annealing rate.

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Acknowledgment

Financial support from Institute of Nanoscience and Nanotechnology of University of Kashan is highly acknowledged.

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Authors and Affiliations

  1. Institute of Nano Science and Nano Technology, University of Kashan, Kashan, P. O. Box 87317-51167, Iran

    Sima Alikhanzadeh-Arani (Assistant Professor), Mohammad Almasi-Kashi (Professor), Zahra Pezeshki-Nejad (Ph.D. Student), Abdolali Ramazani (Associate Professor) & Masoud Salavati-Niasari (Professor)

  2. Department of Physics, University of Kashan, Kashan, 87317-51167, Iran

    Mohammad Almasi-Kashi (Professor) & Abdolali Ramazani (Associate Professor)

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  1. Sima Alikhanzadeh-Arani
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  2. Mohammad Almasi-Kashi
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  3. Zahra Pezeshki-Nejad
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  4. Abdolali Ramazani
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  5. Masoud Salavati-Niasari
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Correspondence to Sima Alikhanzadeh-Arani.

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Manuscript submitted October 15, 2015.

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Alikhanzadeh-Arani, S., Almasi-Kashi, M., Pezeshki-Nejad, Z. et al. Detection of Single-Domain Co2FeAl Nanoparticles Using First-Order Reversal Curve Method. Metall Mater Trans A 47, 5234–5241 (2016). https://doi.org/10.1007/s11661-016-3662-9

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  • DOI: https://doi.org/10.1007/s11661-016-3662-9

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