抄録
The understanding of the effect of microstructures on the magnetic domain and the magnetic domain wall is most likely to lead to development of practical magnetic materials which have desired magnetic properties. In this study, magnetic domain structures in some soft magnetic materials have been observed by a Kerr microscopy and the Lorentz microscopy in order to clarify the effect of grain boundaries (GBs) on the magnetic domain structure and the magnetic domain wall motion. The GB character, the misorientation and orientation of GB plane were analyzed by an FE-SEM/EBSP/OIM system. It was found that the nucleation of reverse domains in the vicinity of the GB depended on the inclination of the GB plane. The Lorentz microscopy observation has revealed that the GB has a strong pinning effect against domain wall motion when a segment of domain wall is located on the GB plane.
