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Room-temperature polar Kerr rotation hysteresis major loop (straight line) and minor loop (dashed line) of the studied film structure. The field sweeping rate was .
Polar Kerr image of an ac-demagnetized film.
Magneto-optical Polar Kerr rotation image (a) and sketch of the magnetization arrangement (b). The spin-down domain (black) was created by ten successive perpendicular field pulses of duration and amplitude. The image was taken after switching off the field.
Dependence of the perpendicular stray field component on the distance from the border of the domain or the base of channels with different width (straight line: No channel; dashed: ; dotted: ). Inset: Sketch of the calculated structure.
Polar Kerr rotation images as in Fig. 3(a), but after applying a positive magnetic positive field during and freezing this state in zero field (a), or at negative field , applied for (b).
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