Heating a magnet causes the individual magnetic domains within the magnet to become more disordered, resulting in a decrease in overall magnetization.
When a magnet is heated, the thermal energy causes the atoms within the magnet to vibrate more vigorously, disrupting the alignment of the magnetic domains and reducing the strength of the magnet.
Yes, a magnet can regain its magnetic properties if it is cooled down slowly in a controlled manner. This allows the magnetic domains to realign and regain their original orientation.
The temperature at which a magnet loses its magnetization varies depending on the type of magnet and its composition. However, most magnets will start to lose their magnetization at temperatures above their Curie temperature.
At high temperatures, the thermal energy is strong enough to overcome the magnetic interatomic forces that keep the domains aligned. This causes the domains to become permanently disordered even after the magnet is cooled down, resulting in a permanent loss of magnetization.