Explanation
magnetostriction refers to ferromagnetism materials that will stretch or shorten in the magnetize direction when the object is magnetize in the magnetic field, and its size will change significantly when the current through the coil changes or the distance from the magnet is changed. It is usually called iron magnetostriction materials. Its size change is much larger than that of magnetostriction materials such as ferrite, and the energy generated is also large, so it is called super magnetostriction materials.
Classification
Fundamental of Material Science -> Physical and chemical basis of materials