Title :
Inductive write heads for greater than 60 Gb/in2 demonstration
Author :
Chen, Y. ; Tong, H.C. ; Shi, X. ; Wang, J. ; Liu, F. ; Stoev, K. ; Jensen, W. ; Rathi, D. ; Martinez, L. ; Pansoy, H. ; Dong, Z.W. ; Yan, X. ; Chien, C.
Author_Institution :
Adv. Technol. Dept., Read-Rite Corp., Fremont, CA, USA
fDate :
7/1/2001 12:00:00 AM
Abstract :
Sputter deposited FeRhN films with a Bs value of more than 20 kG were used as high moment flux enhancement layer in the write element in order to achieve a recording density of 63.2 Gb/in2. This layer was disposed between write gap and upper portion of the top pole, which was made of Ni45Fe55 with a Bs of 16 kG. A 36 dB overwrite and nonlinear transition shift of less then -20 dB were obtained at this recording density. A finite element model was used to calculate the longitudinal field and field gradient at the medium location. The results suggested significant increases of both by incorporating the flux enhancement layer
Keywords :
iron alloys; magnetic heads; magnetic thin films; rhodium alloys; sputtered coatings; FeRhN; field gradient; finite element model; flux enhancement layer; high moment flux enhancement layer; inductive write heads; longitudinal field; nonlinear transition shift; recording density; sputter deposited FeRhN films; top pole; write element; write gap; Coercive force; Magnetic domains; Magnetic films; Magnetic heads; Magnetic materials; Magnetic properties; Magnetic recording; Magnetostriction; Soft magnetic materials; Sputtering;
Journal_Title :
Magnetics, IEEE Transactions on
