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Issue 42, 2011
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Chemical synthesis of hard magnetic SmCo nanoparticles

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We report a facile synthesis of ferromagnetic SmCo nanoparticles (NPs) via a controlled reduction of SmCo–O NPs. The SmCo–O NPs were prepared by co-precipitation of Co(II) and Sm(III) acetates with hexadecyl-trimethylammonium hydroxide and were embedded in a CaO matrix. The 7 nm SmCo3.6–O NPs were reduced by Ca at 960 °C and converted into ferromagnetic 6 nm SmCo5 NPs with their coercivities reaching 7.2 kOe. The synthesis provides a viable route to ferromagnetic SmCo NPs with controlled compositions and magnetism for high performance permanent magnetic applications.

Graphical abstract: Chemical synthesis of hard magnetic SmCo nanoparticles

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The article was received on 21 Apr 2011, accepted on 06 Jun 2011 and first published on 22 Jun 2011

Article type: Communication
DOI: 10.1039/C1JM11753J
Citation: J. Mater. Chem., 2011,21, 16873-16876
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    Chemical synthesis of hard magnetic SmCo nanoparticles

    H. Zhang, S. Peng, C. Rong, J. P. Liu, Y. Zhang, M. J. Kramer and S. Sun, J. Mater. Chem., 2011, 21, 16873
    DOI: 10.1039/C1JM11753J

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