The structures and magnetic properties of the as-spun and annealed Nd9Fe85-xMnxB6 (x=0

0.5

1.0) nano-composite magnetic materials were investigated by XRD

XAFS and vibrating sample magnetometer (VSM). The XRD and XAFS results indicated that the structures of the as-spun Nd-Fe-B nano-composites were largely correlated by the addition of element Mn. With increasing the amount of element Mn

the long-range order of both soft magnetic phase a-Fe and hard magnetic phase Nd2Fe14B largely increased. After annealed at the optimal temperature of 973 K for 5 min

the results implied that the long-range and local structures of the Nd9Fe85B6 were almost the same as those of Nd9Fe84 5Mn0.5B6 and Nd9Fe84Mn1B6. However

the VSM results showed that the coercivity was obviously enhanced from 339 to 398 kA/m for the annealed Nd9Fe85-xMnxB6 nano-composites with the x from 0 to 1. These results were supposed to arise from the exchange coupling between the Nd2Fe14B and α-Fe grains induced by the addition of element Mn.