Figure 6

(a) M–H curves, Mr, Ms, Magnetic moment, Hc, energy density and squareness ratio of Nd2Fe14B, Nd1.75Dy0.25Fe14B and Nd1.5Dy0.5Fe14B particles. (b) Schematic illustration to explain the ferro and anti-ferromagnetic coupling between Nd, Dy and Fe (c) Explanation of coupling and hybridization between Nd, Dy and Fe.