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Papers in a previous issue of this journal [Volume 42, Number 1, 1998] covered advances in metallic magnetic multilayer films, including giant magnetoresistance, oscillatory interlayer exchange, and related effects. To a large extent, those advances made possible significant improvement in read-head sensors for magnetic disk drive systems, leading to a remarkable 60% annual growth rate of areal bit density in magnetic recording systems over the last 15 years!
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