Magnetic properties of (Nd,Pr)-Fe-B nanocomposite over quenched and annealed ribbons

► Over quenched and annealed ribbons of (Nd,Pr)yFebBx alloys are studied. ► Three phases (Nd Pr)2Fe14B, Fe3B and α-Fe are observed. ► The Js and Jr increases as RE/B ratio increases while jHc decreases. ► The (BH)max initially increases up to RE/B≈1 and then decreases.