Magnetic metals are materials that can be attracted to magnets or can become magnets themselves. The most common magnetic metals include iron, nickel, and cobalt. These metals have specific properties that allow their electrons to align in a way that produces a magnetic field. When exposed to a magnetic field, magnetic metals can become magnetized, meaning they can retain some of that magnetism even after the external field is removed. This property is useful in various applications, such as in electric motors, transformers, and magnetic storage devices.