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Journal of Nanomaterials
Volume 2012, Article ID 801240, 4 pages
Research Article

Magnetic Properties of FePt Nanoparticles Prepared by Sonoelectrodeposition

VNU University of Science, 334 Nguyen Trai Road, Hanoi, Vietnam

Received 24 March 2012; Accepted 26 April 2012

Academic Editor: Leonard Deepak Francis

Copyright © 2012 Nguyen Hoang Nam et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Sonoelectrodeposition is a useful technique to make metallic nanoparticles, using ultrasound during electrodeposition to remove nanoparticles as they grow on the cathode surface. This paper reports some structural and magnetic properties of FePt nanoparticles prepared by this method. The as-prepared Fe45Pt55 nanoparticles were ferromagnetic at room temperature. Upon annealing at 700°C for 1 h under H2 atmosphere, the saturation magnetization and the coercivity of the nanoparticles were improved significantly. The annealed nanoparticles showed a high coercivity of 13.5 kOe at 2 K and of 9 kOe at room temperature. Sonoelectrodeposition is a promising technique to make large quantity of FePt nanoparticles.