Magnetization process and magnetostriction of a four percent Si-Fe single crystal close to

The magnetization process in a cube-on-edge Si-Fe single crystal whose tilt angle θ of the [001] axis to a specimen surface is small is experimentally clarified and explained from the viewpoint of the magnetic energy. The relation between the magnetostriction and the domain structure varying with induction is made clear. It is shown that the magnetostriction in the specimen used is quantitatively explained from consideration of the variation of volume of the 90° domain within a lancet structure, which expands or contracts accompanied with a displacement of the main 180° walls in the region of and also with variation of the magnetizing force that directly acts upon the lancet domains in the region of .