Anomalous Magnetostriction of the ‘Grain-orientated’ Silicon–Iron Sheet

THIS communication is concerned with the anomalous phenomenon occasionally found in examining the magnetostriction of the ‘grain-orientated’ silicon–iron sheets, and it was believed to be a prime cause which gives rise to a transformer noise. The method of measurement is the static one which has been adopted by us for a long time1, and by this method the mean value of magnetostriction can be obtained. The experiments were carefully made with respect to a thin plate-like specimen.