Thin films of Nd2Fe14B (similar to 30-60 nm) were grown with c-axis te
xture by means of molecular beam epitaxy. A two-phase structure is obs
erved in both the x-ray diffraction and the hysteresis loops, due to a
n interfacial reaction during the initial growth. Coercivities are 1-2
T at 20 K, and the anisotropy fields are bulk-like. Microstructural a
nalysis by atomic and magnetic force microscopies reveal lateral grain
sizes of similar to 200 nm, which could explain the hard magnetic pro
perties.