write one magnetic material
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Ferromagnetic materials are materials that have magnetic properties similar to those of iron. They can become permanently magnetized. Examples of ferromagnetic materials are nickel, cobalt, and alnico, an aluminum-nickel-cobalt alloy. Electrons by themselves act like tiny magnets.
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Explanation:
Ferromagnetic materials are materials that have magnetic properties similar to those of iron. They can become permanently magnetized. Examples of ferromagnetic materials are nickel, cobalt, and alnico, an aluminum-nickel-cobalt alloy.
Magnetic fields are produced by currents. Permanent magnets are the result of "magnetization currents" flowing inside the material. The magnetization currents in materials are a consequence of the electron's orbital motion and spin. Electrons have an intrinsic property, called spin. Because they have spin, they have a magnetic moment, similar to a small current loop. Electrons by themselves act like tiny magnets. If you pick an axis, an electron's magnetic moment can either be parallel or anti-parallel to this axis. In an atom the electrons are arranged in orbitals. An orbiting electron can have an additional magnetic moment similar to the magnetic moment of a tiny current loop. If all the magnetic moments of the electrons in an atom do not completely cancel out, then the atom will act like a tiny magnet.
atomic magnet
When any material is placed into a magnetic field its atoms acquire an induced magnetic moment pointing in a direction opposite to that of the external field. The material becomes magnetic. This is called diamagnetism. The diamagnetic field produced by the material opposes the external field, but, except in superconductors, this diamagnetic field is very weak. If the atoms of a material have no magnetic moment of their own then diamagnetism is the only magnetic property of the material and the material is called diamagnetic. Copper is such a material.