MAGNETIZATION PROCESS ALONG A DIRECTION INCLINED TO THE ANISOTROPY AXIS

The magnetization reversal process in thin Nd0.1Co0.9 films has been o bserved using a transmission electron microscope equipped with a speci al attachment to generate a homogeneous magnetic field in the film pla ne. When the direction of external field is inclined to the uniaxial a nisotropy axis the domain structure, low angle Neel walls and rotation s of local magnetization direction are asymmetric. An inhomogeneous di stribution of the local magnetization direction inside a ferromagnetic film is a source of the stray field. An analysis of domain configurat ion indicates that the asymmetric low angle Neel walls are charged and produce strong stray fields perpendicular to the domain walls. In the new phase domains the stray field is positive, while in the old phase this field is negative. The local stray fields modify the incoherent rotations as well as the S-W instability and usually oppose the proces s of incoherent rotation. The local stray field has been calculated in terms of modified Stoner-Wohlfarth model.