Influence of boundary geometry in domain wall propagation in magnetic films with asymmetric holes: Micromagnetic calculations

4 páginas, 2 figuras.Micromagnetic simulations have been performed in uniaxial magnetic films with 2D array of asymmetric arrow shape holes. In order to understand the asymmetric pinning potential created by the holes, different boundary geometries conditions are used on the simulations. The depinning fields for forward and backward domain wall propagation have been calculated by the analysis of the energy landscapes as a function of the domain wall position. Domain wall depinning occurs preferentially at the free ends of the domain wall at the film boundaries. We have found that the domain wall propagation is different at the top/bottom boundaries of the simulated film which can be understood in terms of the magnetostatic energy and the chirality of the domain wall.Work supported by Spanish MICINN (grants NAN2004-09087 and FIS2008-06249 (Grupo Consolidado)) and Principado de Asturias FICYT (grants PCTI BP06-109 and IB08-106).Peer reviewe