Substances exhibiting it can be analyzed by polishing the surface with an appropriate colloidal suspension, producing Bitter patterns.  These patterns provide evidence for the "domain" theory explaining this property, as does the Barkhausen effect, which holds that it increases in a series of minute jumps as the applied magnetic field is increased. Occurring below the Curie point, FTP, what is thi
Substances exhibiting it can be analyzed by polishing the surface with an appropriate colloidal suspension, producing Bitter patterns.  These patterns provide evidence for the "domain" theory explaining this property, as does the Barkhausen effect, which holds that it increases in a series of minute jumps as the applied magnetic field is increased. Occurring below the Curie point, FTP, what is this property seen in elements like cobalt, nickel, and iron, in which substances are magnetized by weak magnetic fields?
Substances exhibiting it can be analyzed by polishing the surface with an appropriate colloidal suspension, producing Bitter patterns.  
ferromagnetism