Rare Earth Magnet Basics / Glossary of Magnet Terms / Magnetostriction
- Magnetostriction
- This is a slight deformation (warping) generated when a strongly magnetic body is magnetized. This is also called magnetic strain. The size depends on the intensity of spontaneous magnetization, the crystal axis directions, etc., but δL/L is a mere 10-5 to 10-6. Internal stress affects the magnetic domain structure and magnetization structure through magnetostriction and generates magnetic anisotropy. Magnetostriction is also one cause of strange noise in motors.
