Distribution of normal component of magnetization in elements of T-type permalloy circuits

Abstract

For the first time the distribution of normal (perpendicular to the elements plane) component of magnetization M in T and I bars of efficient bubble domain propagation circuits at various orientations and values of external magnetic field H has been studied by means of magnetooptic micromagnetometer method, where previously measurements of horizontal component of magnetization M have been obtained.*Parts have been discovered, where M emerges from the plane of bars, which are magnetostatic wells for the bubble. While H is oriented along I, two parts with M have been registered with dimensions of about 1/8 that of I. When H is oriented perpendicularly to a short section of T, one magnetostatic well is observed in its centre, and when H is oriented at an angle of 45° to the short section of T, three magnetostatic wells appear. The distribution of M in the short section of T in case of longitudinal magnetization is similar to that of M in I. It has been found that M in the whole range of operate fields does not exceed O, IMs.