Permanent Magnet
A piece of magnetic material made from ferromagnetic materials (such as iron, nickel, cobalt, rare-earth alloys, or lodestone) that retains its magnetism after being removed from a magnetic field.
A piece of magnetic material made from ferromagnetic materials (such as iron, nickel, cobalt, rare-earth alloys, or lodestone) that retains its magnetism after being removed from a magnetic field.
