Sm21Fe179

Sm₂₁Fe₁₇₉ is an iron-rich rare-earth intermetallic compound containing samarium, part of the SmFe family of permanent magnet materials. This material is of primary research interest for high-performance magnetic applications where strong permanent magnetism is needed, particularly in contexts exploring alternatives or supplements to conventional rare-earth magnets like Nd₂Fe₁₄B. The high iron content makes it potentially cost-effective compared to heavy rare-earth magnets, though this particular stoichiometry is primarily encountered in materials science research rather than mature industrial production.