What is the Curie temperature of a permanent magnet? 

The Curie temperature is the temperature above which a permanent magnet loses its magnetization because the thermal energy becomes high enough to disrupt the alignment of the magnetic domains. For common materials:

   – Neodymium magnets have a Curie temperature between 310°C and 370°C.

   – Samarium-cobalt magnets have a higher Curie temperature, around 700°C.