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How does temperature affect Ndfeb magnets?

March 11,2023

Ndfeb magnets are known for their superior magnetic strength. They're a rare earth magnet made of neodymium alloy. Although there are other types of rare earth magnets, such as samarium cobalt magnets, Ndfeb magnets are currently the most powerful permanent magnets in commercial use.


How does temperature affect neodymium magnets?

When heated, the magnetism of the NdFeb magnet becomes weak, they don't necessarily lose the ability to generate magnetic fields. However, Ndfeb magnets usually produce a weaker magnetic field when heated.

Exposure to temperatures of 80 degrees Celsius or higher can weaken neodymium magnets. The characteristic of NdFeb magnets is that the north and South Pole atoms align with each other. Heat causes these atoms to move around. Because the atoms are no longer aligned, the Ndfeb magnet becomes less magnetic.

To maintain their strength, you should keep neodymium magnets away from all heat sources. Heat sources include furnaces, welding torches, ovens, etc. Even short-term exposure to a heat source can weaken Ndfeb magnets.

Is low temperature affecting Ndfeb magnet?

Low temperatures usually do not weaken or otherwise damage neodymium magnets. In fact, it can help neodymium magnets regain some of their lost strength. If a neodymium magnet is weakened by heat, low temperatures may restore it.

Cold temperatures can rearrange the atoms in a neodymium magnet. Exposure to high temperatures causes atoms to lose their alignment. Conversely, exposure to cold causes the atoms to rearrange, regaining the strength that neodymium magnets have lost. Neodymium magnets become stronger as the atoms move back to their original alignment. By restoring the lost strength of neodymium magnets, low temperatures will essentially reverse the effects of thermal exposure.

It is important to note that low temperatures will not fix all cases of heat-weakened neodymium magnets. Neodymium magnets may not regain their lost strength when exposed to too high a temperature. Cold temperatures do not restore the magnet's lost strength.


In conclusion, when using neodymium magnets, be aware of nearby heat sources.

Neodymium magnets can withstand some temperature fluctuations, but exposure to temperatures of 80 degrees Celsius or higher weakens them.