Kevin Elkins et al 2005 J. Phys. D: Appl. Phys. 38 2306 doi:10.1088/0022-3727/38/14/003
Kevin Elkins, Daren Li, Narayan Poudyal, Vikas Nandwana, Zhiqiang Jin, Kanghua Chen and J Ping Liu
Show affiliationsMonodisperse face-centred tetragonal (fct) FePt nanoparticles with high magnetic anisotropy and, therefore, high coercivity have been prepared via a new heat treatment route. The as-synthesized face-centred cubic FePt nanoparticles were mixed with salt powders and annealed at 700°C. The salts were then removed from the particles by washing the samples in water. Monodisperse fct FePt particles were recovered with the particle size and shape being retained. Coercivity of the isolated particles up to 30 kOe at room temperature has been obtained.
75.50.Tt Fine-particle systems; nanocrystalline materials
75.60.Ej Magnetization curves, hysteresis, Barkhausen and related effects
Condensed matter: electrical, magnetic and optical
Issue 14 (21 July 2005)
Received 15 April 2005, in final form 15 May 2005
Published 1 July 2005
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