Magnetic properties of isotropic Sm–Fe–N magnets produced by compression shearing method

Abstract

TbCu7-type Sm–Fe–N powder was consolidated into bulk materials at room temperature by the compression shearing method. The resultant Sm–Fe–N bulk magnets retained the original TbCu7-type structure without any appreciable decomposition. It was found that the TbCu7-type Sm–Fe–N bulk magnet is magnetically isotropic. The isotropic Sm–Fe–N bulk magnets exhibited a maximum energy product of 20 MGOe with a coercivity of 9.5 kOe.