Domain patterns and reversals by wall movements of thin films of iron and nickel iron

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Abstract
The reversal of the direction of magnetization by domain wall movements has been studied on two thin evaporated ferromagnetic films (Fe and Ni-Fe) by the Bitter colloid technique. For each film the magnetization reversal was observed both parallel and perpendicular to the direction in which a magnetic field was applied during evaporation. The behaviour of the iron film is similar in both directions but in the case of the nickel-iron film the reversal of magnetization in the perpendicular direction takes place mainly by rotation