Title :
1.5 Gbit/in2 perpendicular recording with inductive head
Author :
Honda, N. ; Ouchi, K. ; Iwasaki, S.
Author_Institution :
Akita Res. Inst. of Adv. Technol., Japan
fDate :
9/1/1997 12:00:00 AM
Abstract :
High density recording on perpendicular recording media using inductive heads was studied. A MIG head with a small gap length of 0.15 μm could write on a Co-Cr medium of 100 nm thickness with the same write performance as that of a head with a larger gap length. A high D 50 of over 200 kFRPI with the S/N of 30 dB was obtained for a track width of 3 μm, indicating a high areal density recording of 1.5 Gbit/in2. The density limit would be increased much higher using an improved Co-Cr-Nb medium with a high resolution AMR head. Improvement in O/W was obtained by introducing a thin soft magnetic backlayer. A small time decay in the output and the low noise property of the double layer media were also confirmed
Keywords :
chromium alloys; cobalt alloys; ferromagnetic materials; magnetic recording noise; niobium alloys; perpendicular magnetic recording; 0.15 micron; 100 nm; 3 micron; AMR head; CoCr; CoCrNb; MIG head; areal density recording; density limit; double layer media; gap length; high density recording; inductive head; noise property; perpendicular recording; thin soft magnetic backlayer; time decay; track width; write performance; Coercive force; Grain size; Magnetic confinement; Magnetic heads; Magnetic noise; Magnetic recording; Magnetosphere; Noise level; Perpendicular magnetic recording; Signal to noise ratio; Soft magnetic materials; Tail;
Journal_Title :
Magnetics, IEEE Transactions on
