Monodispersive CoPt Nanoparticles Synthesized Using Chemical Reduction Method

Monodispersive CoPt nanoparticles in sizes of about 2.2nm are synthesized by superhydride reduction of CoCl₂ and PtCl₂ in diphenyl ether. The as-prepared nanoparticles show a chemically disordered A₁ structure and are
superparamagnetic. Thermal annealing transforms the A₁ structure into chemically ordered L1₀ structure and the particles are ferromagnetic at room temperature.