Issue 42, 2011
From the journal:

Journal of Materials Chemistry

Chemical synthesis of hard magnetic SmCo nanoparticles†

Hongwang Zhang,a   Sheng Peng,‡a   Chuan-bing Rong,b   J. Ping Liu,b   Ying Zhang,c   M. J. Kramerc  and  Shouheng Sun*a  

* Corresponding authors

a Department of Chemistry, Brown University, Providence, RI, USA
E-mail: ssun@brown.edu
Fax: +1 401 863 9046
Tel: +1 401 863 3329

b Department of Physics, University of Texas at Arlington, Arlington, Texas, USA

c Division of Materials Science and Engineering, Ames Laboratory, USDOE, Iowa State University, Ames, IA, USA

Abstract

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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Article information

DOI
https://doi.org/10.1039/C1JM11753J
Article type
Communication
Submitted
21 Apr 2011
Accepted
06 Jun 2011
First published
22 Jun 2011

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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