Ferromagnetism

Ferromagnetism is a phenomenon where certain materials, like iron, become magnets themselves. In these materials, groups of atoms can align their magnetic moments (tiny magnetic fields) in the same direction, which creates a strong overall magnetic field. This alignment occurs due to interactions between the atoms, and if the material is made into a magnet, it can retain this magnetism even after an external magnetic field is removed. Ferromagnetic materials are widely used in technology, from electric motors to data storage devices, due to their ability to produce and hold magnetic fields.