Fe65B22Nd9Mo4 bulk nanocomposite permanent magnets produced by crystallizing amorphous precursors

► Fe65B22Nd9Mo4 amorphous sheets were synthesized by copper mold casting technique. ► Nanocomposite magnets were obtained after annealing the amorphous precursors. ► The influences of annealing temperatures on the magnetic properties were studied. ► The exchange coupling between magnetic phases exists in the magnet.