Magnetic recording at a data rate of one gigabit per second

Magnetic recording at a data rate of 1 Gb/s was studied in detail. Dynamic flux response of the inductive write head under the write current excitation of 40 mA/sub o-p/ at 500 MHz was simulated by Finite Element Model (FEM). Results show that, while severe eddy current damping was observed at the yoke region, an efficient design in the apex region can significantly reduce the eddy current damping at the pole tips, thus rendering sufficient magnetic flux at 1 Gb/s. The effects of magnetic yoke and interconnect on the current rise time were also simulated by SPICE model and were compared with empirical results. A reasonable agreement was obtained, Dynamic coercivities in the media were also characterized. Finally, magnetic recording at 1 Gb/s has been demonstrated on media as high as 4000 Oe of VSM coercivity and with better than 10/sup -7/ of bit error rate.