Magnetostriction in electrical sheet steels

An investigation into the magnetostriction of five grades of iron and silicon iron electrical sheet materials is described. It is shown that large variations in magnetostriction occur with direction in the sheet relative to the rolling direction, and typical forms of the magnetostriction hysteresis loops observed are reproduced. A theoretical analysis of some of the results throws some light on the probable directional distribution of magnetization in the domains constituting the material.