Rare Earth Magnet Basics /Magnetization Methods and Characteristics
There are two methods generally used to magnetize permanent magnets: static magnetization and pulse magnetization. The first magnetizes via a static electromagnetic field and normally only generates a magnetic field of up to 2MA/m. Pulse magnetization, on the other hand, is used when stronger magnetic fields are desired, or for multipolar magnetization. Each method is optimized for specific materials, shapes and polar configurations. Shin-Etsu can provide ideal magnetizing power and yoke recommendations. Please consult our staff for further information.
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In order to attain maximum magnetic potential, it is necessary to magnetize a material to its saturation point. The magnetizing characteristics of Shin-Etsu rare earth magnets vary according to type.
R Series Samarium Rare Earth Magnets
Demagnetization characteristics differ depending on the coercivity HcJ of the magnet. Therefore, a greater magnetic field is needed to achieve saturated magnetization for magnets with greater coercivity.
N Series Neodymium Rare Earth Magnets
These magnets are excellent in magnetization, and virtually stable in regard to coercivity. However, special care is needed when re-magnetizing these magnets after demagnetization. Please consult our staff.
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