MICROMAGNETICS OF 2-LAYER LAMINATED FILMS WITH SUPERIMPOSED DOMAINS

The micromagnetic structure of the walls in two-layer laminated films has been investigated using the high-resolution longitudinal Kerr effect. Superimposed Bloch lines of opposite type (cross or circular) in the two magnetic layers are observed and interpreted. The mixed type of walls with twin and superimposed Neel segments is discussed. The magnetization distribution at crossing points between the twin walls nucleated in a hard axis field is deduced from the Kerr effect contrast of the walls and quasiwalls. The appearance of superimposed 360-degrees walls and segments in 90-degrees walls in samples with biaxial anisotropy is shown.