The temperature dependence of the anisotropy field and anisotropy constants of Sm2Fe17N3 was evaluated from the calculated magnetization curves, using crystal field parameters obtained in a previous study. The anisotropy field of Sm2Fe17N3 at 0 K was estimated to be 750 kOe; this estimate was confirmed by pulsed-field magnetization measurements up to 1100 kOe. The coercivity of Sm2Fe17N3 magnets was found to be strongly influenced by the maximum applied field. This fact indicates that the coercivity of Sm2Fe17N3 magnets is nucleation-controlled. The coercivity of Sm2Fe17N3 magnets increased monotonically with decreasing temperature, except in the case of a zinc-bonded magnet (30 wt% Zn). The relationship between the coercivity and the magnetocrystalline anisotropy of Sm2Fe17N3 is discussed.
