Shin-Etsu Rare Earth Magnets

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Curie temperature

The temperature at which a ferromagnetic body or ferrimagnetic body shifts to the paramagnetic state due to temperature rise. The magnetic moments lined up in the magnetic body are constantly vibrating due to heat fluctuation. As the temperature rises, the heat fluctuation becomes stronger and proportional to this, the magnetic moment alignment becomes disrupted. Finally, this order is completely lost. The temperature at which this happens is the Curie temperature. In order to show strong magnetism at normal temperatures, this Curie temperature must be adequately higher than room temperature. Curie temperatures higher than room temperature are attained in the transition elements of iron, cobalt, and nickel and in alloys of these metals and rare earth elements.

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Glossary list