thumb|A magnet made of alnico, a ferromagnetic iron alloy, with its keeper thumb|Paramagnetism, ferromagnetism, and spin waves Ferromagnetism is a property of certain materials (such as iron) that results in a significant, observable magnetic permeability, and in many cases, a significant magnetic coercivity, allowing the material to form a permanent magnet. Ferromagnetic materials are noticeably attracted to a magnet, which is a consequence of their substantial magnetic permeability.
thumb|A magnet made of alnico a ferromagnetic iron alloy with its keeper thumb|Paramagnetism ferromagnetism and spin waves Ferromagnetism is a property of certain materials (such as iron) that results in a significant observable magnetic permeability and in many cases a significant magnetic coercivity allowing the material to form a permanent magnet Ferromagnetic materials are noticeably attracted to a magnet which is a consequence of their substantial magnetic permeability