What happens to a magnet when it is heated?

When a magnet is heated, its magnetic properties can be affected due to increased thermal energy. As the temperature rises, the thermal vibrations of the atoms within the magnet can disrupt the alignment of magnetic domains, which are responsible for its magnetism. If the temperature exceeds a certain threshold known as the Curie temperature, the magnet may lose its magnetism altogether and become demagnetized. Upon cooling, some materials may regain their magnetic properties, while others may not.