Title :
Magnetic recording at a data rate of one gigabit per second
Author :
Liu, Francis H. ; Shi, S. ; Wang, J. ; Chen, Y. ; Stoev, K. ; Leal, L. ; Saha, R. ; Tong, H.C. ; Dey, S. ; Nojaba, M.
fDate :
3/1/2001 12:00:00 AM
Abstract :
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 mAo-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 10-7 of bit error rate
Keywords :
coercive force; disc drives; eddy currents; finite element analysis; hard discs; magnetic flux; magnetic heads; 1 Gbit/s; 500 MHz; SPICE model; VSM coercivity; apex region; bit error rate; current rise time; data rate; disk drives; dynamic coercivities; dynamic flux response; eddy current damping; empirical results; finite element model; inductive write head; magnetic recording; magnetic yoke; pole tips; write current excitation; Coercive force; Damping; Disk recording; Eddy currents; Integrated circuit interconnections; Magnetic analysis; Magnetic flux; Magnetic heads; Magnetic recording; SPICE;
Journal_Title :
Magnetics, IEEE Transactions on
