Synthesis and characterization of FePt/Au core-shell nanoparticles

Details Synthesis and characterization of FePt/Au core-shell nanoparticles Synthesis and characterization of FePt/Au core-shell nanoparticles

2009-11-25

arxiv.org/abs/0911.4785v1

Journal of Magnetism and Magnetic Materials 316, e753 (2007)

Physics

Condensed Matter

Materials Science

JEMS 2006, conference paper

Scientific paper

10.1016/j.jmmm.2007.03.084

In this work, the structural and magnetic properties of the gold-coated FePt nanoparticles synthesized from high-temperature solution phase are presented. The amount of gold was optimized to obtain most of the FePt particles coated. The particle diameter increases from 4 to 10 nm as observed by TEM. The magnetic properties are largely affected by the coating. At low temperature, the coercive field Hc of the coated nanoparticles decreases about three times respect to the uncoated and the blocking temperature reduces to the half. The changes of the magnetic behavior are discussed in terms of the effect of the gold atoms at the FePt core surface.

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