Effect of dipolar interactions for domain wall dynamics in magnetic thin films

Physics – Condensed Matter – Materials Science

Scientific paper

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Accepted for publication in the March 2010 issue IEEE Transactions on Magnetics

Scientific paper

We study the effect of long range dipolar forces on the dynamics and morphology of domain walls in magnetic thin films by numerical simulations of the spin-1 random field Ising model. By studying the size distribution of avalanches of domain wall motion arising as a response to quasistatic external driving, we observe a cross-over from the case dominated by short range interactions to another universality class where the long range dipolar forces become important. This crossover is accompanied with a change of the domain wall morphology from a rough wall to walls with zigzag structure.

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