Magnetostriction due to domain reorientation in grain-oriented 3% SiFe

The relationship between magnetostriction and the domain structure in grain-oriented (110)(001)3% SiFe has been investigated as a function of magnetising angle, phi, from the (001) direction. The 180 degrees and zig-zag domains on the specimen surface are revealed for phi <30 degrees and phi >or=30 degrees respectively. The negative and positive magnetostriction in (001) and (110), respectively, with phi is ascribed to the movement of 90 degrees domain walls formed at the boundaries between the zig-zag and the closure domains along +or-(100), +or-(010). The magnetostriction along the H-field direction is formulated in terms of the magnetostriction in (001) and (110), which is shown to be proportional to the volume fraction of the transferred closure domains from the (001) direction.