Journal
JOURNAL OF PHYSICS D-APPLIED PHYSICS
Volume 38, Issue 14, Pages 2306-2309Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0022-3727/38/14/003
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Monodisperse 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 degrees 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.
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