The dynamics of magnetic domain‐wall motion in two dimensions for materials of interest to vertical Bloch‐line memory devices has been simulated on the Connection Machine. By use of a Fourier transform technique to evaluate the demagnetizing fields and explicit time integration of the Landau‐Lifshitz‐Gilbert equation, the equilibrium configuration of a domain wall and the dynamic structure of a wall in the presence of an external field has been studied. Horizontal Bloch‐line (HBL) nucleation, propagation and ‘‘punch through’’ can be observed in moving walls. The domain‐wall configuration for stripe chopping has been investigated and HBL motion is seen to be a dominant feature in this process.
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