Ferromagnets

Ferromagnets are materials like iron, cobalt, and nickel that can become strongly magnetic. This happens because their tiny magnetic regions, called domains, naturally align their magnetic moments in the same direction when exposed to a magnetic field. Once aligned, the material becomes magnetized and can attract other magnetic objects. Even after removing the external magnetic field, many ferromagnets retain some magnetization, making them useful in magnets and electronic devices. The strong and stable magnetic properties of ferromagnets stem from their atomic structure and the way their electrons interact.