Magnetic properties of exchange coupled NdFeB/FeCo nanocomposites prepared with different mol% (x) of FeCo nanoparticles.

(100 − x)%Nd–Fe–B/x%Fe–Co	0.0	7.7	26.9	42.3	100
H c (kOe)	3.9	5.6	3.7	3.3	0.6
M r (emu g−1)	44.0	54.0	52.0	47.0	43.0
M s (emu g−1)	67.0	79.0	83.0	91.0	152.0
(BH)max (MGOe)	2.35	4.27	3.87	2.10	0.61