Figure \PageIndex10: (a) A schematic representation of a hard disc write head. (b) The co-ordinate system used to write the spatial dependence of the write head field in the Karlqvist approximat...Figure \PageIndex10: (a) A schematic representation of a hard disc write head. (b) The co-ordinate system used to write the spatial dependence of the write head field in the Karlqvist approximation. The write head ”flies” over the surface of the disc at an altitude of approximately 25 nm, and the magnetic film on the disc is magnetized by the fringing field produced at the magnet gap.
