We have fabricated a highly textured Nd-Fe-B thin film with a hard magnetic performance: Mr =1.39 T, Hc =827 kA/m, and (BH) max =358 kJ/ m3. The microstructure of the film was characterized in detail by cross-sectional and plane-view transmission electron microscopy observations. The film consisted of nanosized columnar grains with an average size of 40 nm and included a strong diffraction contrast along the grain boundary. A high resolution energy filtered image indicated that Nd was enriched discontinuously along the grain boundary, causing an unsuitable decoupling among the Nd2 Fe14 B grains, which is in agreement with the pinninglike feature of the initial magnetization curve.
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