Size-controlled synthesis and magnetic studies of monodisperse FePd nanoparticles.

Monodisperse FePd nanoparticles were prepared through thermal decomposition of iron carbonyl and reduction of palladium acetylacetonate in the presence of mixing capping agents. The size of FePd nanoparticles can be easily tuned from 8 nm, up to 27 nm by controlling the molar ratio of surfactants and reaction temperature. The magnetic studies indicate that the blocking temperature and coercivity of the FePd nanoparticles exhibit a size-dependent behavior.