3 ms·

Heat the thing above its Curie temperature, and it loses its magical powers: https://en.wikipedia.org/wiki/Rare-earth_magnet#Magnetic_properties https://en.wiki

• ggm 8y ago
  Then why reclaim by heating?
  • iNerdier 8y ago
    You don’t keep them that hot forever...
    • ggm 8y ago
      de-magnetised while hot is not the same as demagnetised by .. misunderstood what was being said. I thought it was a permanent de-magnetisation