Method and apparatus for controlled generation of wall topology in magnetic domains

Abstract From the Canadian patent

Magnetic domains with defined wall topologies are controllably generated from a domain having known characteristics A "mother" bubble domain of a known wall state is generated by nucleation. The mother domain is stretched and split in the presence of a magnetic field directed across the separation area. A pair of Bloch lines is generated in every splitting process. The assignment of the lines to either one or the two resulting domains depending upon the wall state of its mother domain and the direction of the directed magnetic field. Instead of the directed magnetic field, velocity inducing forces can be applied to the elongated domain. The effect desired is to incline the wall …