Rare Earth Magnet Basics / Glossary of Magnet Terms / Neutralization
- Neutralization
- Setting the magnetization of a magnetic body to 0. There are alternating neutralization that passes through a minor loop by alternatingly inverting the external magnetic field and thermal neutralization that erases the magnetization by raising a strongly magnetic body above its Curie point with no external magnetic field present, then cooling it. However, alternating neutralization can not bring the magnetization completely to zero. In particular, it is necessary to pay attention to the fact that when remagnetizing a neodymium sintered magnet after alternating neutralization, a strong magnetic field is necessary. Also, because the heating above the Curie temperature used in thermal neutralization affects the magnetic characteristics and surface treatment, in actual practice neutralization is often extremely difficult.
