N-doped Fe2MnSn Heusler at 12.5 at% (1 N per 8 host atoms). N at octahedral interstitial (0,0,1/4). Paper reports MAE=0.61 MJ/m3, Tc=744 K, hardness=0.65. Source: Jami et al., arXiv:2507.01832 (2025).