| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1804787 | Journal of Magnetism and Magnetic Materials | 2006 | 8 Pages |
Abstract
CoPt3 nanoparticles are synthesized by a two-stage route using NaBH4 as a reductant. The nanoparticles are characterized by thermogravimetry (TG) and differential thermal analysis (DTA), Fourier transform infrared (FT-IR), transmission electron microscopy (TEM) and X-ray diffraction (XRD). Structural and spectroscopic studies show that the nanoparticles adopt a face-centered-cubic (FCC) crystalline structure with an average particle size of 2.6 nm. SQUID studies reveal that as-synthesized nanoparticles are superparamagnetic at room temperature and ferromagnetic at 1.85 K with coercivity of 980 Oe. Annealing of the samples at 500 °C causes an increase of particle size and a decrease of coercivity.
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Condensed Matter Physics
Authors
Xueyan Du, Makoto Inokuchi, Naoki Toshima,