Journal
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
Volume 369, Issue -, Pages 228-233Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jmmm.2014.06.042
Keywords
Magnetic nanoparticle; FeCo nanocube; High saturation magnetization; Air-stable magnetic alloy
Funding
- Suranaree University of Technology (SUT)
- Office of the Higher Education Commission under NRU project of Thailand
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FeCo nanocubes are of great interest due to their outstanding magnetic properties and larger contact area compared to the spherical particles. Herein, the FeCo nanocubes could be obtained by the reduction of metal ions by hydrazine hydrate under a concentrated basic condition. It was found that shape of the FeCo nanocubes varied from cubic with a mean edge length of 130 +/- 3 nm to polyhedron (diameter around 500-700 nm) depending on the concentration of using polymer. A lot of irregular nanoplates were also obtained when used the excessive polymer. In addition, the as-synthesized particles were air-stable which might be related to the formation of thin polymer shells on particle surfaces. The FeCo nanocubes also possessed exceptional magnetic properties at room temperature, including a very high saturation magnetization (217.14 emu/g) and low coercivity (85.95 Oe). (C) 2014 Elsevier B.V. All rights reserved
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