Synthesis and Characterization of Crystalline FeCo Nanoparticles

Authors: Kim, Chang Woo; Kim, Young Hwan; Cha, Hyun Gil; Lee, Don Keun; Kang, Young Soo

Source: Journal of Nanoscience and Nanotechnology, Volume 6, Number 11, November 2006 , pp. 3417-3421(5)

Publisher: American Scientific Publishers

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Abstract:

The monodispersed FeCo nanoparticles were synthesized with borohydride as a reducing agent by coprecipitation method in aqueous solution. The composition and the size of FeCo nanoparticle was controlled by fitting the molar ratio of starting material, the reaction time and the falling rate. To prepare the crystallized nanoparticles, the amorphous FeCo nanoparticles were annealed at the different temperatures for 1 hr, respectively. The size of the crystalline FeCo nanoparticles was controlled in order to maintain the uniform size of 20nm. The as-annealed FeCo alloy could get the highest M_s value of the powder which has been ever synthesized by coprecipitation or other chemical method. The size- and shape-controlled crystalline FeCo nanoparticles can be applied for spring magnet in order to get exchange coupling effect.

Keywords: SOFT MAGNETIC MATERIAL; FECO ALLOY; NANOCRYSTALLITE; COPRECIPITATION

Document Type: Research article

DOI: 10.1166/jnn.2006.024

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