When Does Ferromagnetism Occur?

Ferromagnetism arises from the spontaneous lining up of permanent dipoles parallel to each other within a compound. These magnetic dipoles arise from the movement of pairs of electrons within their atomic/molecular orbital's (162).

How do you know if a substance is ferromagnetic?

Properties of Ferromagnetic Materials

The atoms of ferromagnetic substances have permanent dipole moment present in domains. Atomic dipoles in ferromagnetic substances are oriented in the same direction as the external magnetic field. The magnetic dipole moment is large and is in the direction of the magnetizing field.

What causes metals to be ferromagnetic?

Ferromagnetism is a phenomenon that occurs in some metals, most notably iron, cobalt and nickel, that causes the metal to become magnetic. The atoms in these metals have an unpaired electron, and when the metal is exposed to a sufficiently strong magnetic field, these electrons' spins line up parallel to each other.