It is closely related to ferroelectricity; the relation between antiferroelectricity and ferroelectricity is analogous to the relation between antiferromagnetism and ferromagnetism.
In order to have ferromagnetism, the atoms must have permanent magnetic moments which are not due to the motion of classical charges.
For materials that show some other form of magnetism (such as ferromagnetism or paramagnetism), the diamagnetic contribution becomes negligible.
An extension of this method that allows for internal magnetic charges is used in theories of ferromagnetism.
In ferroics, ferroelasticity is the mechanical equivalent of ferroelectricity and ferromagnetism.
An everyday example of ferromagnetism is a refrigerator magnet used to hold notes on a refrigerator door.
They give rise to ferromagnetism, antiferromagnetism or ferrimagnetism, depending on the nature and relative orientations of the individual spins.
Other low-temperature ground states that occur in such materials are superconductivity, ferromagnetism and antiferromagnetism.
