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

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