Study of magnetization reversal in N?el and Bloch regime of nickel and permalloy stripes using Kerr microscopy

We present a systematic study of the magnetization reversal of nickel and permalloy micro-stripes with N?el 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 N?el domain wall regime showed higher domain wall density in Bloch regime for both nickel and permalloy stripes.

Automated summary

Observations using Kerr microscopy revealed the propagation of stripe-like domains from narrower regions to wider regions in micro-stripes when a magnetic field is applied along the width. Comparisons showed higher domain wall density in the Bloch regime for both nickel and permalloy stripes.