Rotational hysteresis and magnetization reversal mechanisms in Sm–Fe–N permanent magnets

Abstract The mechanism of magnetization reversal processes in Sm–Fe–N permanent magnets has been investigated on the basis of the analysis of the rotational hysteresis energy, Wr, calculated from the magnetic torque curves. Moreover, the anisotropy constants K1 and K2 have been determined from the Fourier analysis of the torque curves. The results are compared with the theoretical predictions.