Why does iron(or other magnetic substance) loses their magnetism when heated?

Iron becomes non magnetic when heated above 770°C. The temperature at which the substance loses its magnetism is called Curie point. High temperature disturbs the process of magnetism i.e, when the iron is heated,the atoms of the iron are vibrated with higher kinetic energy and loses the ability to be magnetized. Higher K.E.(random motion of the molecule) scrambles the iron atom so they can’t create magnetic field.