Ag assisted evolution of ordered L10 CoPt alloy nanoparticles

Effect of boron addition on the structure and magnetic properties of CoPt nanoparticles

“…It was reported that doping Ag at up to 70% still enhances the L1 0 phase. 22 The difference between the Ag doping and our case is that Ag atoms are inert and do not interact with Co or Pt atoms to create any particular compounds. The peaks of pure Ag can still be found in the XRD pattern.…”

“…The peaks of pure Ag can still be found in the XRD pattern. 22 On the other hand, B atoms have chemically reacted with Co or Pt atoms forming the second phases. Thus, the mechanism of promoting the L1 0 between B addition and Ag doping is different.…”

Ferromagnetic L10-Structured CoPt Nanoparticles for Permanent Magnets and Low Pt-Based Catalysts

“…26−29 In general, nanoparticle annealing usually results in particle growth and sintering/agglomeration, making them not suitable for practical magnetic or catalytic applications. The addition of noble metals in CoPt, in contrast to the FePt, does not affect the ordering temperature significantly; 30 however, Sb doping reduces the ordering temperature, but still, an annealing at 400 °C is required to reach a 1 kOe coercivity at room temperature. 31 Similarly, addition of B leads to coercivities of 12 kOe at room temperature after annealing at 600 °C for 2 h, close to the value reported at 700 °C for 2 h in the binary system, effectively reducing the annealing temperature by 100 °C.…”

Surface magnetism of L10CoPt alloy: first principles predictions

“…For example, Tsoukatos et al [18] and Cai et al [19] reported that the coercivity Hc of CoPt thin films decreased with their reduced layer thickness and grain size. Hence, the knowledge on surface magnetism of L1 0 CoPt alloy will help us to tune the magnetic properties of L1 0 CoPt nanostructures through tailoring their chemical doping, shape, size, and morphology [20][21][22][23].…”