The suitability of nickel nanowire arrays for perpendicular magnetic storage media with areal densities beyond the superparamagnetic limit (>70 Gbit/in{sup}2) will be analyzed in this paper Highly ordered alumina pore channel arrays are used as templates for the fabrication of magnetic nanowire arrays with a periodicity of 65 (180 Gbit/in{sup}2) and 100 nm (75 Gbit/in{sup}2) and pore diameters between 30 and 55 nm A nearly perfect hexagonal arrangement for the magnetic columns occurs only inside very narrow process windows for periodic distances of 65,100 and 500 nm, and - in contrast to most publications in this field - a degree of pore filling of almost 100% was achieved (Fig 1).
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