Cu 0.9999903 Curie's Law Pierre Curie found that magnetisation decreases with temperature. Above the Curie Temperature , magnetisation disappears completely. The Magnetic Dipole Moment gives the turning effect of an external magnetic field on a current loop. The Magnetisation of a material is the net magnetic moment per volume. Ferromagnetism comes from the large increase in magnetisation when domains are aligned.
Hysteresis occurs because the domain re-organisation lags behind the changes in the applied field.
Paramagnetic materials are weakly attracted to a magnet. Diamagnetism materials are weakly repelled from a magnet. Temperature decreases magnetisation.