Magnetic properties of anisotropic Sm–Fe–N bulk magnets produced by spark plasma sintering method

Sm–Fe–N powders were consolidated into bulk materials by the spark plasma sintering (SPS) method. Although partial decomposition of the Sm2Fe17N3 phase was noted in the magnets, the decomposition was reduced by the addition of a small amount of Zn powder to the Sm–Fe–N powder. The anisotropic Sm–Fe–N magnet obtained from a mixture of Sm–Fe–N and Zn powders exhibited a high remanence of 0.90 T with a coercivity of 0.54 MA m−1.