Small-angle neutron scattering study of sintered Nd-Fe-B magnets with different coercivity values

Akiya, Takahiro*; Takeda, Masayasu  ; Suzuki, Junichi; Yamaguchi, Daisuke; Kato, Hiroaki*

In spite of tremendous efforts, a role of intergranular Nd-rich phase in sintered Nd-Fe-B magnets on the coercivity () seems to be still unclear. The purpose of this work is to perform small-angle neutron scattering experiments on the sintered Nd-Fe-B magnets with different values and to investigate whether there exists any correlation between the average structure and the magnitude of . We found that the value of characterized intensity did not depend on the when is parallel to the -axis of the main NdFeB grain. On the other hand, for the configuration, we found that log linearly increases with increasing , for five different samples with ranging from 13 to 16 kOe owing to different annealing conditions.