Magnetization reversal in patterned magnetic multilayers

Patterned “antidot” magnetic multilayers, i.e., hole arrays in continuous films (inset), are attractive for high density data storage. Fe K edge XMCD hysteresis loops (circles) taken on a Gd/Fe multilayer antidot array are shown. XMCD measures the projection of the magnetization along the photon direction so vectorial information is obtained by rotating the sample/magnet assembly with respect to the incident photon beam direction. Micromagnetic simulations (solid lines) yield insight into the microscopic magnetization configurations [Applied Physics Letters 81, 4997 (2002)]

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