Study of magnetization reversal in Néel and Bloch regime of nickel and permalloy stripes using Kerr microscopy

Abstract

We present a systematic study of the magnetization reversal of nickel and permalloy micro-stripes with Néel and Bloch domain walls using Kerr microscopy. Magnetic field driven domain propagation was observed from higher width to lower width stripes for magnetic fields applied along the length of micro-stripes. Stripe like domains were observed with nucleation starting in lower width region followed by their propagation to higher width regions for magnetic fields applied along the width of micro-stripes. The comparison of magnetization reversal in Bloch and Néel domain wall regime showed higher domain wall density in Bloch regime for both nickel and permalloy stripes.