Mechanochemical Synthesis of Dy Substituted Nd2(Fe,Co)14B Magnetic Nanoparticles

We report the synthesis of the Dy substituted (Nd
0.9
Dy
0.1
)
2
(Fe,Co)
14
B nanoparticles with a coercivity value of 10.4 kOe, by a “green” and low cost mechanochemical technique. The properties of these (Nd
0.9
Dy
0.1
)
2
(Fe,Co)
14
B nanoparticles can be improved by magnetic alignment. The remanence $( M_{r})$ tripled after alignment, with an average misalignment angle of 34.2°. The thermal coefficient of remanence (α) is −0.12%, comparable to the room temperature value of commercial Nd-Fe-B magnets.