Is it possible to partly demagnetize neodymium magnets in the flame of a candle? Those magnets are made up of Neodymium, Iron and Borium. They have a Nickel-Copper-Nickel coating. The Curie temperature for Neodymium magnets is 310-400°C. Neodymium (magnetic powder) burns but does the coating prevent that? How does Nickel and Copper react to high temperatures?