Magnetic phase transition and magnetocrystalline anisotropy of Sm2Fe17CxNy

Abstract
Alternating current(ac)susceptibility and high magnetic field measurements were performed to investigate the magnetic phase transitions and the magnetic anisotropy fields in Sm2Fe17C x N y with x=0, 0.4, 0.7, and 0.9. An unidentified magnetic phase transition is observed in all Sm2Fe17C x N y compounds, which is neither due to a spin reorientation nor due to a first‐order magnetization process (FOMP) transition. Samples of Sm2Fe17C x N y (x≳0) have even higher anisotropy fields than are found in Sm2Fe17N y .