Abstract
Very high information storage densities have been realised by perpendicular magnetic recording and it is possible that 10 Gigabits per square inch will be achieved on hard disks by the end of the century. The special requirements of perpendicular recording have led to the development of unique materials which are reported in this paper. Advances in materials for disks, magnetic underlayers, seed layers, perpendicular anisotropy information storage layers, and head materials will all be discussed in the context of present and future perpendicular recording systems.
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