Chemical synthesis of narrowly dispersed SmCo[sub 5] nanoparticles

✍ Scribed by Gu, Hongwei; Xu, Bing; Rao, Jiancun; Zheng, R. K.; Zhang, X. X.; Fung, K. K.; Wong, Catherine Y. C.

• Book ID: 120377894
• Publisher: American Institute of Physics
• Year: 2003
• Tongue: English
• Weight: 507 KB
• Volume: 93
• Category: Article
• ISSN: 0021-8979
• DOI: 10.1063/1.1537697

✦ Synopsis

In this article we report a chemical synthetic means for generating a high Ku magnetic material—narrowly dispersed nanoparticles of SmCo5. Using Co2(CO)8 and Sm(acac)3 as the precursors under air-free conditions, we produced SmCo5 nanoparticles according to the procedure reported by Sun et al. [Science 287, 1981 (2000)] but with some modifications. The nanoparticles, with diameters of 6–8 nm, have a SmCo5 composition, as indicated by transmission electron microscopy, electron diffraction, and x-ray photoelectron spectroscopy. The magnetization measurement of the nanoparticles, exhibits superparamagnetism, which is blocked for temperatures below ∼110 K, suggesting Ku to be ∼2.1×106 erg/cm3 for the as-prepared particles.