Grain boundary restructuring and La/Ce/Y application in Nd–Fe–B magnets
Yan Mi, Jin Jiaying, Ma Tianyu
       

XPS spectra of (a) B 1s level, (b) Fe 2p level, (c) La 3d level, and (d) Nd 3d level in [(Pr, Nd)1−x(La, Ce)x]2.14Fe14B strips with x = 0.1–0.5.[23]